Foy graduated from the Auburn University in 1992, receiving his commission as an Ensign in the United States Navy via NROTC.

He volunteered for and received orders to Basic Underwater Demolition/SEAL training (BUD/S) at Naval Amphibious Base Coronado.

Following SEAL Tactical Training (STT) and completion of six month probationary period, he received the 1130 designator as a Naval Special Warfare Officer, entitled to wear the Special Warfare insignia also known as "SEAL Trident".

Foy completed deployments as Assistant Platoon Commander with a Marine Amphibious Ready Group (MARG/EUCOM) and one deployment as Platoon Commander on board USS Dwight D. Eisenhower (CVN 69).

At DEVGRU he also held numerous leadership positions including chief staff officer, director of operations from 2011 to 2013 and Deputy Commander from 2013 to 2014.