Do you know HRD Portal of Chamber of Commerce of Ex Servicemen has a very powerful Job Search Engine like Trivago? It searches 50 top jobs portals including military jobs portals to present search research.
To use the portal go to the link http://jobs.militarychamber.org/mil/jobs/ in search engine write details of job rank and place and click search and it gives you best results from top 50 jobs portals. it is single window jobs search engine. No need to go to 50 websites to search the jobs.
Click here for job search.