Brett was born and raised in Lancaster, Pennsylvania. He graduated from Virginia Tech with a business degree in Economics. After college, he enlisted in the United States Marine Corps and served as an Infantryman and Infantry Squad Leader in 3rd Battalion 3rd Marine Regiment. He received a commission as an Artillery Officer and served in 3rd Battalion 10th Marines and 3rd Battalion 8th Marines Battalion Landing Team as part of the 26th Marine Expeditionary Unit Special Operations Capable that participated in the initial Peace Enforcement Operations in Kosovo.
Brett served six years of active duty service and two years of active reserve service. During his service, he earned the additional military occupational specialty of 8531 Range Coach (Marksmanship Instructor) and completed the SLAM (Skills for Leaders in Advanced Marksmanship) Course.
After the Marine Corps, Brett served for six years as a United States Border Patrol Agent assigned to the El Centro Sector, Calexico Station. He worked patrol, all-terrain vehicle unit and mountain bikes. Brett graduated the Border Patrol’s Federal Law Enforcement Training Center Firearms Instructor Training Program (FITP) and was subsequently assigned to Sector Training for over 18 months as a full-time firearms instructor.
Brett worked for seven years as a Police Officer for the Town of Herndon, Virginia. He worked patrol, mountain bike patrol and training assignments and administrative assignments. He was a certified Virginia Department of Criminal Justice Services general instructor and firearms instructor. He conducted firearms and tactical training for the Department for over three years. He was a factory certified armorer on issued pistols, rifles, submachine guns, and shotguns.