1stSgt Harshman is a native of Bluffton, Ohio. He graduated from Columbus Grove High School, Columbus Grove, Ohio, in 2008. He enlisted in the Marine Corps in June 2008, completing recruit training at Parris Island, South Carolina, and subsequently reporting to the School of Infantry East.
In October 2008, Pvt Harshman reported to 8th and I Marine Corps Barracks, Washington D.C., where he was assigned to Bravo Company, 3rd Platoon. During his tour, he held billets ranging from rifleman to Company Guide.
In February 2012, Corporal Harshman reported to 2nd Battalion, 7th Marines (2/7), assigned to Golf Company, 1st Platoon, serving as 1st Squad Leader. He deployed to Afghanistan in September 2012 as 1st Platoon’s 1st Squad Leader in support of Operation Enduring Freedom. Upon returning from deployment, Sgt Harshman attended Advanced Infantry Course and was selected to join the Scout Sniper Platoon, becoming a Scout Sniper Team Leader and later the Scout Sniper Platoon Sergeant.
In August 2014, he transferred to become the PSD Platoon Sergeant and deployed in September 2014 with the Special Purpose Force MAGTAF Crises Response CentCom in support of Operation Inherent Resolve, where he assisted in training the Iraqi Army and Air Force.
In January 2016, Sergeant Harshman reported to Marine Corps Combat Instructor Course, School of Infantry East (SOI-E). Upon graduation, he was assigned to Alpha Company, 1st Platoon, serving as a Squad Instructor, Platoon Commander, Offense Company Package Lead, Battalion Offense Package Lead, and the Battalion Force Fitness Instructor. While at SOI, he completed the Force Fitness Instructor Course, Infantry Unit Leaders Course, Staff Non-Commissioned Officer Career Course, and The Marine Corps Advisor Course.
In 2019, he departed SOI-E to report to 2nd Battalion, 2nd Marines (2/2), Golf Company, 3rd Platoon, as the Platoon Sergeant. He deployed with UDP 20.1 to Okinawa, Japan, in late 2019 and redeployed as the Scout Sniper Platoon Sergeant on UDP 21.2, Okinawa, Japan. SSgt Harshman was then selected for Gunnery Sergeant and served as the Company Operation Chief of Easy Company, completing his time at 2/2.
He then reported to Marine Corps Security Force Battalion, Kings Bay, Georgia, serving as Alpha Company Platoon Sergeant, H&S Company Operation Chief, Bravo Company Operation Chief, and Bravo Company 1stSgt. He is currently serving as the Senior Enlisted Leader of 5/14 N Btry I&I Unit.
His personal awards include two Navy and Marine Corps Commendation Medals, two Navy and Marine Corps Achievement Medals, and a Combat Action Ribbon.