You should be familiar with the structure of Jamit Job software or else please dont quote.i wont pay unless you are an expert and have previous experience and can show proof.
Professional custom theme should be a clean [url removed, login to view] is the design required [url removed, login to view] ofcourse you will need to create the psd's too along with inner pages designs.
Also need a CMS - Careers Section - features needed are integrated Forum, news Blog, Q&A mentorship section and an Articles section. The layouts and header/footer etc need to be matched to the overall website and integrated cleanly.
You can integrate with Joomla and Phpbb, need common login etc. Jamit has plugins for both which am sure you know if you have experience with Jamit (or else DONT BID)
Plz let me know your quote, hope its not high as its only simple template+ CMS integration work