In the summer between his junior and senior years at Muhlenberg College in Allentown, Pa., Will completed Marine Officer Candidate School. After graduation, he was commissioned as a Second Lieutenant in the U.S. Marine Corps and completed the Basic Officer Course and the Marine Infantry Officer Course.

Will served for four years with the Second Battalion, 5th Marine Regiment (2/5) at Camp Pendleton, Calif. While serving with 2/5, he was deployed to Baghdad, Iraq, in support of Operation Inherent Resolve and as the Battalion Landing Team for the 31st Marine Expeditionary Unit. Will held several leadership roles during his five years of active duty, including Rifle Platoon Commander, Weapons Platoon Commander, Company Executive Officer, and Battalion Assistant Operations Officer.

In 2022, Will received the Major General Sidney Shachnow Grateful Nation Award from the Jewish Institute for National Security of America. The award recognizes a non-commissioned or junior officer from each of the five military branches for significant contributions to the Global War on Terrorism. Will was recognized for his actions in response to numerous rocket, mortar, and unmanned aerial system attacks by Iranian-aligned Shia militia groups during his deployment to Iraq.

In March 2023, Will concluded his active-duty service as a captain in the Marine Corps.