The DAV has a program called Help for Heros. An overview of the program can be found at https://www.dav.org/learn-more/news/2017/help-for-heroes/ DAV has partnered with the PenFedFoundation to offer assistance to veterans who have a disability rating or are working with DAV's National Service Officers to submit a disability claim.
Also, each of the armed services has a Aid Society to aid active and retired personnel. Here is a list of the Aid Societies for each branch:
The US Army has a financial program called the Army Emergency Relief fund. It is for active and retired soldiers that are in financial difficulty.
The Air Force has a program called the Air Force Aid Society. It grants emergency loans and grants to active and retired personnel.
The Navy and Marine Corps have the Navy Marine Corps Relief Society that helps with active, and I assume retired personnel. (Their list of documents to bring says "Most recent leave and earnings statement (LES) or retiree account statement (RAS)")
The Coast Guard has the Coast Guard Mutual Assistance.
Hopefully one of these programs would be able to help the veterans you work with.