Professional Experience At Professional Filing Systems, we provided Department of Defense storage systems, workspace and mailroom solutions since 1984. We represent over 30 various manufacturers. This allows us to customize a solution to your specific needs. Here are just a few of our military clients: Randolph Air Force Base Lackland Air Force Base Fort Sam Houston Laughlin Air Force Base U.S. Navy U.S. Coast Guard Brooke Army Medical Center Brooks Air Force Base Download our GSA Quick Reference Guide to see a listing of our currect GSA Contracts. Professional Filing Systems is a certified HUB vendor.