Eugene Sierras was born in Tucson, Arizona. He attended local schools and graduated from the University of Arizona in 1964. Immediately after graduation he was called to active duty and commissioned as Ensign, United States Naval Reserve. He served aboard the USS Rockville (EPCER 851) as a surface warfare officer. After completing his tour on Rockville he completed Naval Flight Officer Training receiving his wings in January 1967. He served two tours with Fighter Squadron Ninety Six embarked on the USS Enterprise (CVAN 65) and completed two tours in Southeast Asia. He served a total of eight years in fighter squadrons and completed a Mediterranean tour aboard the USS Roosevelt (CVA 42). He retired in 1986 after completing several shore assignments. He completed a second career as a civilian employee with the Arizona Department of Public Safety in 2005. He resides in Tucson, Arizona.