He was involved in Operation Ivory Coast, the raid on the Son Tay prisoner of war camp, and later the rescue of the crew of the SS Mayagüez.

[2] It was during this time that then-Staff Sergeant Fisk participated in Operation Ivory Coast, the raid on the Son Tay prisoner of war camp, in November 1970 and received the Silver Star for his actions.

Fisk, flying aboard Knife 51, a 21st Special Operations Squadron CH-53, was a member of the assault force that successfully recovered the ship, attempted to rescue the crew, and liberated the entrapped US Marines.

Knife 51 was the last helicopter to evacuate the Marines from Koh Tang and Fisk was the last Air Force serviceman to leave the ground, having combed the beach for stragglers.

In October 1979 Fisk worked at Headquarters, Aerospace Rescue and Recovery Service, Scott AFB, Illinois, as the Pararescue Standardization and Evaluation Flight Examiner.

After a parachute injury in 1980, Fisk left pararescue duty to serve as an instructor at the USAF Senior Noncommissioned Officer Academy, Gunter AFS, Alabama.