Mastin is a South Carolina native who was commissioned in the U.S. Marine Corps in 1975, served 34 years active service, and transitioned out of the U.S. Marine Corps in November 2009 to move back to the Upstate.
He was privileged to lead at every operational level in the Marine Corps, including commanding a Counter-Terrorism Task Force in combat, the 2nd Marine Division, the 3rd Marine Division, and Marine Corps Special Operations Command. His staff tours included Military Assistant to the Secretary of Defense and Director of Strategy, Plans, and Assessments for General Dave Petraeus in Iraq. Over his career, he served multiple tours in 8 different combat zones.
Since retiring, he helped found Upstate Warrior Solution, a nonprofit to help veterans, first responders, and their families, in the Upstate of South Carolina, and he has worked with a number of businesses as a consultant, board member, and CEO/president.
Mastin is proud of his military heritage with a grandfather who served in WWI, a father who served in WWII, a brother who served in Vietnam, a son-in-law who served in Iraq, a son who served in Iraq and Afghanistan, and his college-sweetheart wife of 46 years, who created a loving home for him to always return.