view specific group in 365 sharepoint site

I am looking for someone to help with a project that involves viewing a specific group in a 365 SharePoint website. This project is for an existing business, and so while there are certain features that need to be incorporated into the website, the project needs to be done focusing on existing company protocols and standards. I already have a SharePoint site in place, so just view the site and assign the group the required permission level which is "Full Control". The job requires someone who is experienced in working with SharePoint websites, in particular for enterprises, and can get the job done quickly.