Hi there, I'm Matt Sergei (do call me Matt) and would like to help you (26 years a webmaster, 15 years a WordPress developer) yet I need some clarifications.
After looking your attached image I believe you would like to add some additional "content types" (everything in WordPress database is some type of content, plugins and some themes usually save them to separate database tables).
So I'm more interested to know what should they be used for since you are mentioning some kind of matching of candidates and employers. I don't have the theme and would need to log in your website first with admin user privileges to check it (as former Internet Security System Engineer for 6 years in large bank I value and practice high security all the time).
I'm practically free yet 3 days I'm bidding might not be enough - adding even 10 different content types with related editing templates in WordPress dashboard take patient and focused time (with my rate at $120/day). If a theme/plugin doesn't provide a basic skeleton while it usually expects to have certain structure of content types it supports this might quickly get to weeks of work.
Feel free to send me more details, I might at least help even if I cannot see your website internally.
Regards and hope you're safe,
Matt