 He attended Dr. Walter C. Ralston Intermediate School and Garden Grove High School in Garden Grove, California and played tight-end on the school's football team, graduating in 1999.Monsoor enlisted in the United States Navy on March 24, 2001, and attended Basic Training at Recruit Training Command Great Lakes, Illinois.Upon graduation from basic training, he attended Quartermaster "A" School, and then transferred to Naval Air Station Sigonella, Italy for a short period of time.