Update My Apple Push Services Certificate Which Is Expiring

I have an app which needs push services and I just received a message that my certificate is expiring in 30 days. I am sure this is an easy task for someone who knows what they are doing, but I am not a developers and do not want to mess around with my database and servers. My hopes is to find someone with a good amount of experience on servers and database management, because this job will open the door for future jobs that I will need done. I will need to upgrade my servers in a month or two so that they can handle more users, and so that will be another job in the near future that will need to be done. My app is a bit complicated because we have an android app and iOS app. They are on one database. Then we have the website which is on another database. Those two databases need to remain in sync always which was tough to get set up as registrations must be synced between the two at all times. We actually went through 3 developers until everything was done right and working properly. So I am concerned about someone new coming in and changing things around without knowing the issues that we faced in the past. So if you do apply for this small job, make sure that you have a lot of knowledge for the things I brought up as it's important to us to find a new manager who can do our jobs when needed. Our last developer has gone on to a new project with their company and are not really dealing with small jobs anymore.