LtCol Chalkley enlisted in the Marine Corps Reserve in April 1992 and was commissioned a Second Lieutenant in May 1995 through the PLC program following his graduation from The Citadel with a degree in history.
Following Basic School and the Infantry Officer Course, he was assigned to 3d Battalion, 7th Marines in September 1996.
During this tour, LtCol Chalkley served as Rifle Platoon Commander and Company Executive Officer and participated in various exercises and a unit deployment to the Western Pacific. In December 1998, LtCol Chalkley was transferred to the 31st Naval Construction Regiment, Port Hueneme, CA where he served as the Military Training Officer. He subsequently attended the US Army Field Artillery Captain’s Career Course where he graduated with honors.
In April 2002, LtCol Chalkley assumed command of Weapons Company, 1st Battalion, 1st Marines and served as the battalion’s Fire Support Coordinator. During this tour he deployed with the 13th MEU (SOC) to the CENTCOM AOR and participated in OIF. In June 2004 LtCol Chalkley was assigned to I MEF Special Operations Training Group where he served as the Operations Officer and Officer in Charge, Raids Branch. In January 2006, LtCol Chalkley deployed to Iraq as the Team Leader, Military Transition Team 8. During that one year tour, LtCol Chalkley and his team conducted combat operations by, with, and through the 2nd Bn, 3rd Bde, 1st IA Div in Jezeera, Al Anbar Iraq.
Upon his return from Iraq, LtCol Chalkley attended the Command and General Staff College in Fort Leavenworth, KS. He was subsequently assigned to the Joint Center for International Security Force Assistance, Joint Staff J-7 where he served as the Chief, Tactical Support Division. During this tour, LtCol Chalkley deployed to Afghanistan to serve as an LNO to HQ ISAF.
In July 2011, LtCol Chalkley was transferred to Twentynine Palms, CA where he served as the Operations Officer and Deputy Director of the Advisor Training Group (ATG), Marine Air Ground Task Force Training Command. While at ATG he was responsible for training all combat advisor teams deploying to Afghanistan.
In July of 2014 LtCol Chalkley assumed the duties as the Executive Officer, 31st Marine Expeditionary Unit. While with the MEU he deployed four times in the Pacific Area of Responsibility and conducted numerous exercises as well as disaster relief operations in Saipan and Kyushu Japan.
LtCol Chalkley’s personal decorations include the Bronze Star with V, Defense Meritorious Service Medal, Meritorious Service Medal (2nd Award), Joint Commendation Medal, Navy Commendation Medal (2nd Award) and the Combat Action Ribbon.