Lieutenant Colonel McKinney received his commission via the Platoon Leaders Combined Course program and completed Officer Candidate School in August 1999. Upon graduation from The Basic School and the Landing Force Logistics Officers Course in 2000, he was assigned to 1st Battalion, 7th Marines in Twentynine Palms, California. During this tour, he conducted two rotations at the Mountain Warfare Training Center in Bridgeport, California and a unit deployment to Okinawa, Japan. This deployment included a variety of exercises and operations, including Exercise COBRA GOLD in Thailand.
In 2003, First Lieutenant McKinney reported to the School of Infantry (East) at Camp Geiger, North Carolina where he served as the S-4 Logistics Officer, then was frocked to Captain to assume command of Headquarters and Service Company. Captain McKinney transferred to 2d Force Reconnaissance Company in July 2005, deployed to Operation IRAQI FREEDOM as the Logistics Officer, and later completed U.S. Army Airborne School before assuming responsibility for unit parachute and small boat operations. In 2006, after a unit change of designation to 2d Marine Special Operations Battalion, Marine Corps Forces, Special Operations Command (MARSOC) and transition to operational control under United States Special Operations Command (USSOCOM), Captain McKinney became a plank holder and assumed dual billets as the Logistics Officer and Headquarters Company Commander, deploying to Afghanistan in support of Operation ENDURING FREEDOM. In 2008, he completed the Combined Logistics Captains Career Course in Fort Lee, Virginia.
Following graduation in 2008, he was assigned to the J-33, Regional Working Group-Central Command at USSOCOM and deployed twice to Pakistan as the J-4, Director of Logistics, for Special Operations Command (Forward) Pakistan. In September 2010, Major McKinney reported to the 24th Marine Expeditionary Unit, where he served as the MAGTF Logistics Officer and OIC for the Forward Command Element, completing a nine-month deployment to the 5th and 6th Fleet areas of operations including Exercises AFRICAN LION in Morocco and EAGER LION in Jordan, as well as an offload of the maritime prepositioning ship USS Button into Saudi Arabia.
After attending Air Command and Staff College in Montgomery, Alabama during the 2013-2014 academic year, Major McKinney reported to Marine Barracks, Washington D.C. to serve as the Logistics Officer. In June 2016 he was frocked to his current rank and assumed his present duties as the Executive Officer.
Lieutenant Colonel McKinney holds a Bachelor of Science degree in Exercise Physiology from West Virginia University and a Master of Military Studies degree from the Air University. He is a distance education graduate of the Marine Corps Command & Staff College and Amphibious Warfare School and completed the Joint Logistics and Tactical Logistics Officers Courses. His personal decorations include two Defense Meritorious Service Medals, the Meritorious Service Medal, four Navy/Marine Corps Commendation Medals, the Joint Service Achievement Medal, three Navy/Marine Corps Achievement Medals, the Army Achievement Medal, Humanitarian Service Medal, Outstanding Volunteer Service Medal and the Combat Action Ribbon. He is also a qualified naval parachutist.