There are a variety of federal resources for Job seekers. Anyone looking for career information should start at USA.Gov. Free resume assistance and job seeking advice is available at USAJOBS. The website also has a Veterans specific page USAJOBS-Veterans There are also links to national Job Banks.
The US Department of Labor also has a Veterans section on its website that has information on legal issues and re-employment questions that specifically affect veteran job seekers.
Additionally some organizations like Military.com have Veterans Career webpages that you may find helpful.