Hi.
I have gone through your project description and I understood your requirement. I believe I can help you to design an awesome, creative and unique poster, and resize and edit the letterhead word template.
I am an expert graphic designer with industry experience in FLYER DESIGN, POSTER DESIGN, BROCHURE DESIGN, LOGO DESIGN & BRAND IDENTITY DESIGN, ADVERTISEMENT DESIGN, e.t.c.
I would be very delighted to help you carry out the GRAPHIC DESIGN task. Kindly check my portfolio at https://www.freelancer.com/u/datasoftsolution.html for some of my previous designs. I'll be looking forward to your response.
Warmest Regards.
Adams K.