How to Post a Job Public agencies and vendor members can post their job announcements (typically an HR staff person would handle, but not always). On the website www.mainsupt.com, go to the Jobs page. Select the Group/Category you want to post the Job to (for example Full-Time) Select the "Request to Join" button. You will be prompted to either Sign up or Login (if you have not already been approved with a login, then you will select Sign Up with the business email to be used