Eugene Sierras was born in Tucson, Arizona, where he attended local schools and graduated from the University of Arizona in 1964. After graduation, he was immediately called to active duty in the United States Naval Reserve. He received his commission from the Naval Officer Candidate School in Newport, Rhode Island, in October of 1964. After completing the Damage Control Assistant Course and Nuclear, Chemical and Biological Warfare School in Philadelphia, Pennsylvania, he was assigned to the USS Rockville (EPCER 851) where he served until receiving orders to the Basic Naval Aviation Observer’s School in Pensacola, Florida, via Preflight Training.
He received his Navy Flight Officer Wings in 1967 and after completing Ready Replacement Training at Fighter Squadron One Twenty-One in San Diego, California he was assigned to Fighter Squadron Ninety–Six, embarked on the USS Enterprise (CVAN 65), and completed two combat cruises in Southeast Asia. He completed various shore assignments until he was assigned to Fighter Squadron Eighty-Four embarked on the USS Roosevelt (CVA 42) and completed a Mediterranean cruise in 1975. After an assignment to the Aviation Training Command, he served a tour as communications officer aboard the USS Lexington (AVT 16).
He served as a plank owner at the newly formed Joint Special Operations Command in Fort Bragg, North Carolina, until receiving orders as executive officer of the Naval Support Activity New Orleans from where he retired in 1986.
Eugene returned to Tucson, Arizona, and completed a career with the Arizona Department of Public Safety where he worked as a police dispatcher and licensing agent for security guard agencies and personnel and private investigative agencies and personnel.
He currently resides in Tucson, Arizona, with his wife.