There is no simple process for obtaining a current or former military member's contact information. The Privacy Act of 1974 forbids the military branches from providing members' postal or email addresses or phone numbers to private citizens or organizations. In addition, the service branches generally have no way to get in touch with former military members who have separated from the service. They may be able to help you locate military retirees.
For help contacting members of the U.S. Navy, U.S. Marine Corps, or U.S. Air Force, call or write to that branch's military personnel locator. The personnel locator will generally forward your request to the military member, if possible. Each locator has its own requirements.
The U.S. Army and the U.S. Coast Guard no longer provide military locator services.
You can request changes to your military record or discharge from the review or correction board for your branch of the service. Surviving spouses, next of kin, or legal representatives of deceased or incompetent veterans can also request changes.