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I have a new robot concept in mind and need an expert who can take it from sketches to a fully simulated model. You will be responsible for the full digital workflow—mechanical CAD, kinematic modelling, control‐system setup, and a repeatable simulation that proves the robot’s motions, loads, and cycle times. The exact robot category and primary task are still open, so I welcome your input on whether an industrial, service, or educational configuration makes the most sense once we discuss requirements. Likewise, I am flexible on tooling; if you prefer ROS, MATLAB/Simulink, or V-REP/CoppeliaSim (or a mix), explain why it fits the job and I’ll go with the strongest technical argument. After delivery I should be able to open the model, press “run,” and see the ...

I need professional engineering plans for a city permit. Requirements: - Sign off on existing plans for city approval - Specialization in structural, electrical, or plumbing engineering Ideal Skills and Experience: - Licensed engineer in relevant discipline - Experience with city permit processes - Strong attention to detail and compliance knowledge Please provide your credentials and relevant experience.

I need a skilled engineer to design a Convergent-Divergent supersonic nozzle for jet aircraft propulsion. Requirements: - Design should optimize performance for aerospace propulsion applications. - Must consider factors like pressure ratios, temperature, and flow characteristics. - Provide detailed drawings and specifications. Ideal Skills and Experience: - Background in aerospace engineering. - Experience with nozzle design, particularly for jet aircraft. - Proficiency in CAD software. - Strong understanding of fluid dynamics and thermodynamics.

I am looking for an experienced building energy simulation specialist to support my PhD research on improving building thermal efficiency using lattice-based panels. The project will involve developing and simulating building models using IESVE software, evaluating energy performance under general climatic and geographic conditions, and conducting a comparative cost analysis. The ideal freelancer should have expertise in IESVE, building energy modelling, thermal performance analysis, and energy-efficient building design. Experience with academic research and data visualization is highly desirable. Please share your relevant experience, previous IESVE projects, and estimated timeline and budget.

I'm seeking a skilled CAD designer with engineering expertise to develop a series of system windows, including sliding, casement, and fixed types. The windows will be made from aluminium extrusions. Key Requirements: - Proficiency in CAD software - Experience in product design, specifically with aluminium extrusions - Engineering background - Ability to create detailed and accurate designs for multiple window types Ideal Skills: - Strong knowledge of window systems and their mechanics - Experience in the construction or architectural industry - Attention to detail and problem-solving skills Please provide examples of similar work and your approach to this project.

I need a concise Basis-of-Design document that lays out a complete ventilation strategy for a tunnel-type warehouse used purely for storage of goods. Air quality management is the overriding goal, and every recommendation must satisfy current OSHA standards for worker exposure and contaminant levels. The design will be used in a military application, requiring very silent operation. Include noise-arresting features and suggest solutions adhering to the best business practices. The document has to translate those regulatory requirements into clear design parameters—fresh-air rates, airflow patterns, fan sizing, filtration tiers, sensor placement, and control logic. Because the building is essentially a long tunnel, please address pressure zoning, potential stratification, and smok...

I need assistance to prepare for my WGU course exam. The focus will be on solving problems and writing assignments. Ideal Skills and Experience: - Strong understanding of WGU course material - Problem-solving expertise - Writing proficiency for academic assignments - Previous experience with similar courses is a plus Please include relevant experience in your bids.

I need reliable 2-axis CNC programs that will let me cut a series of aluminum parts accurately and repeatably. You will receive the dimensional information I have—this may be a simple sketch, a DXF, or a solid model—and from there I want complete, ready-to-run code for my machine. I work primarily in aluminum plate, so optimal tool selection, feeds and speeds, ramping strategies, and safe entry/exit moves are important. My machine reads standard G-code; if you create toolpaths in Fusion 360, SolidCAM, Mastercam, or a comparable CAM package, just export the post-processed code along with a quick setup sheet so I can verify tools, zero points, and overall cycle time before the first run. Deliverables • Clean, collision-free G-code files for each part • A brief...

I need a structural engineer to design a wooden beam for a residential building. The beam will support both live and dead loads. Requirements: - Expertise in residential structural engineering - Experience with wooden beam design - Ability to calculate loads and ensure safety Ideal Skills: - Structural engineering degree - Relevant certifications - Previous residential project experience Please provide detailed plans and calculations.

I need a skilled engineer to assist for ETAP studies on hourly basis.

I need a detailed inspection report for a sloped roof structure to ensure compliance with relevant standards and regulations. The report should include an analysis of the current condition, identification of any issues or risks, and recommendations for compliance improvements. Expertise in structural engineering, building inspection, and familiarity with roofing standards are crucial for this project. Please ensure the report is thorough and delivered promptly.

The design package for my one-person, pedal-driven submarine is finished; what I need now is a seasoned composite builder to turn those drawings into a seaworthy vessel. Your main focus will be full construction and assembly. Hull & Materials The outer shell is specified as a carbon-fiber monocoque laid up with epoxy resin and vacuum infusion. Internally, an aluminium space-frame supports the drivetrain, controls, and safety gear. You’ll source, cut, machine, and finish all aluminium components, then bond or bolt them to the cured hull per the drawings I will supply on award. Buoyancy Strategy Instead of active ballast tanks, we will embed closed-cell foam sections inside the hull and fine-tune trim with removable lead weights. Precise placement is critical, so you’ll nee...

I have a steady stream of technical articles written in English that need to be rendered accurately and naturally into Russian. Each piece ranges from 1,500 to 4,000 words and covers topics such as engineering processes, software documentation, and emerging technology trends. What matters most to me is precise terminology and a tone that remains clear to Russian-speaking professionals without sounding too literal. Consistency in style across multiple articles is essential, so if you have experience building and following glossaries or style guides, please mention it. Typical workflow: I send an article in Word format, you return a fully translated file plus a short note explaining any terminology choices that required interpretation. CAT tools like SDL Trados or memoQ are welcome but not...

The assignment involves analysing and designing a propeller propulsion system for a Bristell NG-5 aircraft. There are three main tasks: Propeller Design: Use Blade Element Momentum Theory (BEMT) to calculate propeller performance, using real aerofoil data, and conduct sensitivity analysis and experimental validation. Engine Analysis: Perform thermodynamic calculations to determine engine power and fuel consumption (BSFC) at sea level and different altitudes, and compare results with existing aircraft engines. Engine–Propeller Matching: Determine the optimal propeller diameter, number of blades, blade pitch distribution, and RPM settings for climbing and cruising while minimising fuel consumption. Required deliverables: A professional engineering report (maximum 8 pages, excludi...

I need a skilled DesignBuilder practitioner to compare the thermal performance of single- versus double-glazing on the Western and Southern façade of a two-storey office building located in Windhoek, Namibia. I will supply the building geometry, façade dimensions, local double-glazing specifications, occupancy schedules, and a climate file. Please set up the model with custom HVAC parameters that reflect local requirements rather than generic office defaults. Your analysis must quantify: • Annual cooling energy demand • Peak cooling load reduction • Resulting thermal comfort impacts (e.g., PMV/PPD or equivalent indices) When the simulation is complete, deliver two things: 1. A PDF/Excel report that includes both an executive-level summary with clear c...

This project strictly requires hands-on prototyping, including physical assembly and testing—design-only services will not be considered I already have detailed winding diagrams, coil counts, wire gauges, and a full wiring schematic for three compact electromagnets—each under 10 cm in any direction. Your task is to turn these drawings into a tangible proof-of-concept and ship it to me. The magnets will sit in a custom harness. I’m leaning toward a light alloy or other metal solution, but I’m open to your recommendations once you see the design constraints. All electronic components, fasteners, and raw materials will be reimbursed at cost; please keep receipts. Power can come from batteries, a small AC supply, or a rechargeable pack—I’m happy with which...

Fabricamos puertas metálicas personalizadas todos los días y necesito plasmar cada pedido en un dibujo CAD claro y completo. Cada semana genero al menos diez órdenes nuevas (a veces proyectos grandes con múltiples unidades) y requiero planos desde cero que indiquen: • Dimensiones exactas de marco, hoja, refuerzos y herrajes • Tipo de material (calibre, acabado, perfiles) claramente rotulado en capas separadas No seguimos un estándar formal como ISO o DIN, así que el formato puede ajustarse a tu flujo de trabajo mientras sea coherente y legible para producción y corte. El archivo maestro lo prefiero en DWG o DXF; si sueles trabajar en AutoCAD, SolidWorks o Inventor, perfecto, mientras el resultado final pueda abrirse y medir...

I need a qualified structural engineer to inspect and evaluate the foundation and supports of a residential building. This is for ensuring safety and compliance. Ideal skills and experience: - Professional engineering license - Experience with residential structures - Strong knowledge of foundation systems - Detail-oriented inspection skills - Ability to provide comprehensive evaluation reports

We are looking for a highly proficient Spanish–English bilingual professional to support our team with ongoing solar energy projects. **All work will be conducted remotely**, primarily through virtual meetings and email communication. Key Responsibilities * Provide real-time Spanish–English and English–Spanish interpretation during virtual meetings. * Draft and respond to emails in Spanish and English. * Communicate and follow up with Spanish-speaking vendors, contractors and other stakeholders. * Assist with coordinating project activities, clarifying technical matters and tracking action items. * Support general project communication and follow-ups. Required Skills * Excellent spoken and written proficiency in both Spanish and English. * Strong written communicatio...

My Trumatic 500 (Finpower punch) is down because the punch mechanism has developed a mechanical misalignment. The tool head is no longer striking squarely, so parts are coming out with burrs and the turret jams after a few hits. I need an experienced service technician or mechanical engineer who has already worked on Trumatic or comparable CNC turret punch presses to: • diagnose the source of the misalignment within the punch mechanism • realign or replace the affected components so the tool head returns to factory tolerance • run test punches in multiple stations, proving consistent, burr-free results and smooth turret rotation You will have full access to the machine, manuals, and my maintenance logs. Bring any specialised alignment gauges or calibration sof...

I have a backlog of roughly seventy-seven independent structural engineering items that I need to clear in the coming weeks. Each task is discrete—sometimes it’s a quick load check, other times a set of design calculations, a drawing revision, or a brief review of an existing report. While the workload is sizable, the individual assignments are generally small to medium in scope and can be tackled one by one. Here’s how I’d like to work: • I will release tasks in batches, always with a written brief, the required output format (PDF, DWG, or editable spreadsheet), and a target turnaround time. • You return sealed calculations, sketches, or marked-up drawings that are ready for client or authority submission, complete with your professional stamp where a...

I’m scheduling routine maintenance for my split-type air-conditioner and want someone who knows the system inside out. The service visit should cover the essentials that keep the unit running efficiently and extend its lifespan. Please make sure the following tasks are completed during your visit: • Filter cleaning or, if necessary, replacement • Accurate check and top-up of refrigerant levels • Full system inspection, including electrical components, coils, drain line, and overall performance test I expect you to arrive with the tools and basic consumables needed for a standard split AC tune-up, document any additional parts that might be required, and leave the workspace clean when you’re done. If you find anything outside normal wear and tear, let me k...

I need an engineered stamped photometric plan for a commercial property covering a 2-acre site. The plan is primarily for compliance with local building codes. Requirements: - Detailed lighting layout - Compliance with local building codes - Engineered stamp for validation - Coverage for the entire 2-acre site Ideal Skills and Experience: - Expertise in photometric planning - Familiarity with local building codes - Experience with commercial property requirements - Engineering credentials for stamping Looking for a professional who can deliver accurate and compliant plans.

I need to take our existing steel ute canopy and trim the unit cost while keeping strength, durability and a full one-year warranty intact. You will open the current assembly in Fusion 360 (my house software) and work through every opportunity to remove material, simplify joints, and cut processing time without inviting cracks, distortion or fit-up issues. What you’ll actually do • Re-model or simplify parts for sheet-metal nesting, laser cutting and press-brake folding. • Run detailed FEA on all critical panels, weldments and fastener zones, then iterate until stresses stay well below yield even with the leaner design. • Apply sound DFM/DFA thinking—fewer welds, shared bend lines, common hardware—so the canopy is faster and cheaper to build. • ...

I need G-code to mill a 26-groove, 22-degree spiral on a steel shaft (1.375" long x 2.1" diameter.) using a 1/8" end mill. This mill is a Sharp with Centroid AllInOneDC controller with a 4th axis for rotating the shaft. Machining parameters: - Total depth: .180" - Step down: .060" per pass - Feed rate: 2 inches/min - Spindle speed: 2000 RPM No specific tolerance or surface finish requirements. Ideal skills include G-code programming and experience with knee mills.

I need a structural engineer to calculate specifications for a cantilever rack designed to hold long items like timber and pipes. Each arm of the rack will need to support over 1000 lbs. Requirements: - Calculate load-bearing capacities - Determine appropriate dimensions and materials - Ensure compliance with safety standards Ideal Skills: - Structural engineering expertise - Experience with cantilever rack designs - Knowledge of weight distribution and material strength

Project Title: Active Power Filter for EV Charging Station – MATLAB/Simulink + Hardware Prototype Project Description: I am working on my graduation project, which is an Active Power Filter (APF) for EV charging stations, and I am looking for a Power Electronics Engineer to help me with both the simulation and practical hardware implementation. The project includes: * 3-phase Active Power Filter design * MATLAB/Simulink modeling and simulation * Control strategy and controller design * Harmonic compensation and THD reduction * DC-link design * Power semiconductor switches and gate drivers * Current/voltage sensing * Protection circuits * Filter component selection * PCB design * Hardware prototype implementation * Testing and troubleshooting * Comparing simulation results with ex...

I have completed drawings for a residential addition here in Florida and now need a licensed Florida Professional Engineer to review, digitally sign, and seal them. The set includes a foundation plan, framing plan, and roof plan—each already drafted in PDF. Your task is straightforward: • Verify code compliance for the proposed addition. • Make any red-line comments you feel are necessary and coordinate revisions with me (I’ll turn updates around quickly). • Apply your Florida Digital signature and seal to the drawing set, delivering them back as secured PDFs ready for uploading to a building department permit portal. Please confirm your current Florida PE license number, typical turnaround time. I’m aiming to submit to the county this week, so a prompt s...

I need a detailed CFD study of several laboratory fume cupboards that routinely handle chemicals. The sole aim is to confirm their safety and containment performance, focusing specifically on three points: preventing leakage into the room, quantifying overall containment efficiency, and assessing operator exposure risk at the sash opening. You will receive the 3-D CAD geometry, operating sash heights, fan curves and boundary condition data. From this, set up and run steady-state and, where useful, transient simulations in ANSYS Fluent, OpenFOAM, or a comparable solver. Turbulence modelling, species transport for chemical tracers, and clear visualisation of velocity vectors and concentration iso-surfaces are essential. Deliverables • Solver-ready case and data files • High-res...

I am preparing to lift bulk materials on an ADNOC site and need a complete, submission-ready lifting plan built around crane operations. The document must satisfy every clause of the current ADNOC CoP for Lifting & Hoisting as well as the relevant UAE and international standards so that it can pass review without revision. You will work from the site information, load data and crane capacities I provide, then develop the technical package that ADNOC expects. Deliverables • General lifting plan on the official ADNOC template in both editable and PDF formats • Rigging study with load calculations, crane configuration charts and exclusion-zone drawings (AutoCAD or similar) • Task-specific HIRA / JSA covering all bulk-material handling hazards • Pre-lift inspect...

I’m looking for an experienced mechanical engineer to undertake the development of an innovative energy-system project intended for small commercial applications. The project involves developing a novel mechanical energy conversion and storage concept, progressing from engineering analysis and design optimisation through CAD, simulation/FEA and ultimately toward a working, instrumented prototype and a validated design for scale-up. This is an engineering development and innovation project, not a feasibility-study-only assignment. I am not looking for an engineer whose primary deliverable is simply to review the brief, determine whether the initial concept is viable, and produce a development roadmap. The engineering assessment and calculation will naturally form part of the work, b...

My BMZ Power2Go Work portable power station—just 14 months in service—shut down abruptly while delivering a steady 1 600 W load (it is rated for 2 500 W continuous, 3 600 W peak). Since that moment it refuses to charge or power on; every status LED remains dark. I need a battery technician who can carry out a full diagnostic and bring the unit back to life. That means opening the enclosure, verifying cell health, checking the BMS, charger circuitry, DC-AC inverter stage, and any internal fuses or relays. Once the fault is identified I want the defective components replaced or rebuilt so the pack can once again charge fully and supply its original output ratings without thermal or voltage irregularities. Deliverables: • Detailed test report outlining root cause, measureme...

I need a qualified phlebotomist who can collect both blood and urine samples for diagnostic testing at our clinic. You will handle venipuncture, guide patients through urine collection, label everything with the correct patient identifiers, and log each specimen into our tracking sheet before preparing it for courier pick-up. Sterile technique, proper PPE, and familiarity with Vacutainer systems and standard urine containers are essential. All samples must reach the lab within the required stability window, so please be comfortable coordinating same-day shipment or drop-off. Deliverables • Intact blood tubes and sealed urine cups, each stickered with patient name, date, and time • Completed requisition forms and electronic log entries • Brief incident note if any dra...

CAD Dataset Required – AI Training & Engineering Applications We are looking to source high-quality, commercially licensable CAD datasets for AI training, evaluation and engineering applications. Requirements: 2D technical drawings & 3D CAD models Individual parts/components and complete assemblies Mechanical, automotive, industrial, architectural, electrical and engineering designs Native CAD files and exchange formats such as STEP/STP, DWG, DXF, IGES/IGS, STL, etc. Assembly structures and component relationships Dimensions, tolerances, materials and engineering metadata where available BOMs, annotations, design specifications and supporting documentation Parametric/design-history data preferred Manufacturing/process information is a strong plus Real-world, professionally...

We are looking for an experienced copywriter to rewrite website content for an engineering and precision manufacturing company offering CNC machining, milling, boring, fabrication, welding, grinding, and related services. The goal is to create professional, engaging, SEO-friendly website copy for the Home, About, Services, and individual service pages. Content should clearly communicate our technical capabilities while remaining easy for industrial customers and procurement teams to understand. The project will also include SEO meta titles, meta descriptions, strong headlines, and clear calls to action. Experience writing for engineering, manufacturing, CNC, or other B2B technical businesses is preferred. Please share 2–3 relevant website writing samples when applying.

I’m looking for knowledgeable tutors who can guide me through the full AP stack—Calculus, Physics 1, Chemistry, Computer Science A and Microeconomics—while weaving in my personal interests in informática y software, reparación de computadoras, creación de aplicaciones and the fundamentals of AI. My main objective right now is reparación de computadoras, with an emphasis on hardware-level troubleshooting, so I’d value someone who can tie core AP-physics and computer-science principles directly to real-world repair scenarios. If you can explain circuit diagnostics one day and free-response strategies the next, we’ll be a perfect match. The engagement will be fully online. I’d like regular, structured sessions that blend conce...

I need an intelligent power extension designed to enhance safety and monitoring. The extension should be compatible with standard wall plugs. Key Requirements: - Temperature Sensing: A separate module to sense the temperature. - Power Control: Automatically cut power supply if temperature exceeds a certain threshold. - Status Indicator: A buzzer with light indication to show contactor status (red for off, green for on). Ideal Skills and Experience: - Experience in designing smart electrical devices. - Knowledge of temperature sensors and power control systems. - Familiarity with integrating buzzers and light indicators. - Background in working with standard wall plug systems. Please provide samples of similar work done.

Building Envelope / Thermal / Fire Consultant High-Performance Modular Wall Assembly Development Project Overview The STEEL ONE concept deliberately separates the primary steel structural cage from the building envelope. We are seeking an envelope specialist to develop the layers around the cage so the overall wall system can address thermal bridging, condensation, air/water control, corrosion exposure and fire protection. Primary Responsibilities • Develop conceptual wall assemblies around the structural cage. • Analyze continuous insulation and thermal-break strategies. • Assess condensation risk and vapor-control approach by climate. • Develop drainage, flashing, weep and rainscreen concepts. • Recommend air-barrier and water-resistive barrier continuity detai...

### Patent Writing & Technical Documentation Specialist I am leading a team of engineers, and we are currently developing a new product that we believe has strong potential for patent protection. We are looking for an experienced freelancer who can help us turn our engineering concepts, technical documentation, and invention details into clear, well-structured patent materials. ### What we need The freelancer should be able to: * Understand and analyze technical concepts and engineering designs * Work closely with our engineering team to identify potentially patentable aspects * Organize technical information into a clear invention disclosure * Help prepare patent descriptions, claims, and supporting documentation * Review and improve existing technical writing * Conduct patent an...

I’m hiring an experienced welder who can handle both MIG/MAG (semi-automatic) and TIG processes with confidence. Most of the work revolves around structural-steel assemblies, so you’ll be joining plates, beams, and brackets that later become large frames and sub-components for our production line at STAS NV. Day-to-day expectations • Read and accurately interpret sheet-metal layout drawings to determine weld sequence, joint prep, and positioning. • Fit, tack, and weld components, maintaining proper penetration and bead appearance. • Inspect your own welds and perform minor rework when required, ensuring every joint meets our internal quality criteria. • Keep your station clean, adhere strictly to safety protocols, and document completed work. What su...

I need a U.S.–licensed Professional Engineer to sign off on a set of technical documents for an upcoming project. Because the scope is still being finalized, I’m flexible on discipline—civil, mechanical, or electrical—as long as your state license is current and you can legally stamp drawings or reports. Here’s what I will provide once we connect: the draft plans, supporting calculations, and any local code notes already gathered. Your job is to review for compliance, suggest any adjustments that will keep the project on schedule, and then supply a stamped PDF (plus an editable file, if available) that I can submit to the relevant authorities. If supplementary consultation becomes necessary, I’m happy to set up follow-up calls or milestone add-ons. Whe...

I have an upcoming pre-production run in Hebei that must be checked on-site before we give the factory the green light. I need an inspector who can move comfortably between Italian and Chinese so nothing is lost between my engineering notes and the shop-floor reality. Scope • Visit the factory in Hebei on the agreed date (exact schedule to be shared once NDA is signed). • Verify materials, tooling, and first-off samples against the drawings and purchase specs. • Check the factory’s process controls and calibration records. • Capture clear photos, short video clips where helpful, and all measurement data. Deliverables 1. Same-day verbal debrief with me (Italian). 2. A concise written report within 24 h in both Italian and Chinese that includes: &...

I need a conclusive, engineering-level investigation into a manufacturer’s spherical roller bearings. The goal is to demonstrate—with clear calculations, test results, and industry-standard references—that material defects, design flaws, and manufacturing errors are present in the current production parts. Because no previous reports exist, the entire analysis must start from scratch. That means reviewing drawings and specs (or reverse-engineering if none are supplied), running appropriate load simulations (FEA), conducting metallurgical and dimensional inspections, and benchmarking everything against ISO and DIN bearing standards. I will supply physical samples and any background correspondence I have, but the technical work, data gathering, and interpretation are entir...

I need a comprehensive rewire of a medium-sized school (11-30 classrooms). The project requires the integration of low voltage systems, specifically lighting and small power, along with an addressable fire alarm system. Key requirements include: - Rewiring for all electrical systems - Integration of lighting and small power LV systems - Installation of an addressable fire alarm system Ideal skills and experience: - Electrical engineering background - Experience with LV systems and fire alarms - Familiarity with school environments and safety regulations - Relevant certifications and licenses

I need a comprehensive installation of a new wastewater pipework and systems for an industrial facility, specifically tailored for the wastewater industry. Key requirements include: - Designing and installing robust, efficient wastewater systems - Ensuring compliance with industry regulations and standards - Utilizing durable materials suited for industrial environments - Collaborating with engineers and project managers Ideal skills and experience: - Proven expertise in industrial wastewater system installation - Strong knowledge of regulatory requirements - Experience with high-durability materials and systems - Ability to work on large-scale industrial projects

I have completed the full electrical design for a 1 MW ground-mounted PV installation on Saipan and now need a licensed Professional Engineer who can officially endorse the overall system design so the project can proceed to permitting. Your stamp must be accepted by the local authority having jurisdiction on Saipan, therefore familiarity with Commonwealth of the Northern Mariana Islands (CNMI) requirements is essential. You will receive a comprehensive design package that includes: • Detailed schematic diagrams • Technical specifications for all major components and protection schemes • Existing compliance reports prepared against local regulations Your task is to review these documents, confirm they satisfy Saipan’s electrical code and any referenced U.S...

My goal is to receive a comprehensive dual-diligence report that lets me make a confident investment decision in Brazilian hydropower assets within the next month. The analysis must drill into two core themes—technical performance and financial viability—so I have a clear picture of both how reliably each plant can generate power and how solid the projected returns truly are. SCOPE OF WORK Brazil Hydropower Project – Independent Technical Advisory Support 1. Purpose of Engagement We are seeking an experienced hydropower technical specialist to provide independent technical advisory support for the assessment of an operating hydropower asset in Brazil. The engagement will focus on reviewing the asset’s historical operating performance, hydrological a...