Colonel McCalmont was born on 13 September 1973 in Santa Fe, New Mexico. He received his Bachelor of Arts in Criminal Justice from the University of New Mexico in Albuquerque and was commissioned through the Officer Candidates Course in December 1997. Following the Basic School and the Ground Supply Officer Course, he was assigned to 1st Medical Battalion, 1st Force Service Support Group in October 1998. During this tour, Colonel McCalmont served as the Battalion Supply Officer.
In February 2000, he reported to 1st Supply Battalion as the Assistant Operations Officer for 16 months before deploying with the 13th MEU in November 2001. After returning from the WESTPAC in May 2002, Colonel McCalmont returned to 1st Supply Battalion as the Deployed Support Unit OIC. In January 2003, he reported to Combat Service Support Group 12; he deployed in support of Iraqi Freedom.
In July 2003, he reported to Recruiting Station Albuquerque as the Station Operations Officer and then the Executive Officer. In July 2007, Colonel McCalmont reported to Marine Corps Communications Electronics School to serve as the OIC of the Supply Management Unit and the Headquarters Company Commander.
In July 2010, he reported back to 1st Supply Battalion where he served as the Supply Management Unit OIC and the Supply Company Commander. In April 2012, Colonel McCalmont deployed as the Supply Company Commander in support of OEF 12.1 with 1st Maintenance Battalion REIN. Following deployment, he served as the Operations Officer for 1st Supply Battalion.
In August 2013, Colonel McCalmont reported to Installations and Logistics, Headquarters Marine Corps, Logistics Training and Education Department.
In 2016, Colonel McCalmont took command of 1st Supply Battalion, followed by selection to Top Level School. He received a Master’s degree in Strategic Studies from the Marine Corps War College.
After the completion on Top Level School, Colonel McCalmont received orders to Marine Corps Logistics Operations Group, Twentynine Palms, to serve as the Training Department Head. After selection to his current rank, he was subsequently assigned to the Installation Support Directorate, Marine Corps Air Ground Combat Center, to serve as the Assistance Chief of Staff.
Colonel McCalmont’s personal decorations include the Meritorious Service Medal (4th Award), Navy and Marine Corps Commendation Medal (2nd Award), and the Navy and Marine Corps Achievement Medal.