I want to create a web site to "Hire engineers"

All I'm a IT student who passionate about web site designing & development. I want to create a web site "Hire Engineers" to choose different kind of engineer to different projects.Like Network,Civil,Electronic etc. for that 1.what kind of language i should use?(is PHP good?) 2.Is it better to use a framework or CMS? 3.where can I find sample templates to take ideas regarding this project? thank you!