Mark Jiroch reported to MCRD San Diego on 12 July 1993 and was assigned to Platoon 2042, Echo Company, 2nd Battalion, Recruit Training Regiment. He graduated on 8 October 1993. After ten days of leave, PFC Jiroch reported to Marine Combat Training at Camp Pendleton School of Infantry. After MCT, he flew to Camp Johnson, North Carolina for Administration School where he graduated on 10 February 1994 as an 0151 Personnel Administration Clerk. He subsequently transferred to the Selected Marine Corps Reserve and joined Detachment 2, Bulk Fuel Co A, 6th Engineer Support Battalion, 4th Marine Logistics Group located in Bakersfield, California. PFC Jiroch was promoted to the rank of Lance Corporal on 1 April 1994.
Lance Corporal Jiroch’s first annual training was at Camp Lejeune, North Carolina for PSB Lant 1994. The following summer, he attended Administration Refresher Course at Camp Johnson, North Carolina. During each of the three subsequent years, Lance Corporal Jiroch participated in Strategic Augmentation Units; in 1996 and 1997 at Camp Pendleton, California and in 1998 at Cherry Point, North Carolina. On 2 December 1998 he was meritoriously promoted to Corporal. The following summer, Corporal Jiroch went to Combined Arms Exercise 7-99 at 29 Palms, California. In the year 2000, Corporal Jiroch traveled to Annette Island, Alaska to participate in Operation Alaskan Road. Later that year, he attended Primary Marksmanship Instructor School at Quantico, Virginia and graduated with a secondary MOS of 8531, Primary Marksmanship Instructor. In October of 2000, Corporal Jiroch reenlisted and received a promotion to the rank of Sergeant as part of his reenlistment package. He attended Sergeant’s Course at Camp Crowder, Missouri in the summer of 2002.
In January of 2003, Sergeant Jiroch was mobilized in support of Operation Iraqi Freedom. During the ensuing eight months of active duty, Sergeant Jiroch served in several capacities to include Platoon Sergeant, admin section leader, Sergeant of the Guard, and NCOIC of a shipboard Marine detachment. He spent time in Camp Pendleton, California; Kuwait; and Iraq before demobilizing on 15 September 2003, assuming the responsibilities of Platoon Sergeant for Headquarters Platoon upon his return.
Sergeant Jiroch attended the Reserve Career Course at Camp Crowder, Missouri the following summer after he was selected for promotion to Staff Sergeant. He was promoted on 1 December 2004. In January of 2005, Staff Sergeant Jiroch was selected to fill the billet of Detachment SNCOIC/Reserve Operations Chief. In the summer of 2005, Staff Sergeant Jiroch attended the Bulk Fuel Specialist Alternative Training Implementation Program and received his third MOS: 1391, Bulk Fuel Specialist. For his twelfth AT, Staff Sergeant Jiroch traveled to England as part of a 6th ESB engineer exchange program and trained with Royal Army Engineers. Several months later, he was selected for promotion to Gunnery Sergeant and subsequently attended the Advanced Course at the Staff NCO Academy in Quantico, Virginia. He was promoted to Gunnery Sergeant on 1 December 2007, sixteen days before being mobilized for service in Djibouti, Africa to fill the billet of Company First Sergeant for Alpha Company, 8th Provisional Security Detachment. After one year, Gunnery Sergeant Jiroch demobilized and again filled the billet of Detachment SNCOIC. In 2009 and 2011, he traveled to Hawthorne, Nevada to participate in Operation Javelin Thrust, both times as Company Gunnery Sergeant. For his fifteenth AT, during the summer of 2010, Gunnery Sergeant Jiroch participated in Mountain Survival Course at Bridgeport, California. After being selected for promotion to First Sergeant, he was frocked on 22 April 2012 and transferred to Headquarters and Service Company, 2nd Battalion, 23rd Marine Regiment, 4th Marine Division, Pasadena, California in May of 2012. He attended First Sergeant’s Course in July of 2012 and two months later, attended the Partnership of the Americas annual training exercise at Camp Blanding, Florida. In June of 2013, he attended exercise Dawn Blitz at Camp Pendleton, California.
From October of 2013 to May of 2014, First Sergeant Jiroch filled the billet of Battalion Sergeant Major for 2nd Battalion, 23rd Marines when the billet was vacated early. After re-assuming his role as H&S Company First Sergeant, he participated in his nineteenth annual training, Integrated Training Exercise 14-4 at MCAGCC Twentynine Palms. In May of 2015, First Sergeant Jiroch was assigned to Weapons Company, 2nd Battalion, 23rd Marine Regiment, 4th Marine Division, located at Navy Base Ventura County in Port Hueneme, California and attended a battalion infantry skills training package at Camp Pendleton for his twentieth annual training. He was selected for promotion to Sergeant Major in March of 2016 after which he attended the Cornerstone Academy in Quantico, Virginia. He was frocked during his 22nd annual training exercise, an infantry skills package conducted at Camp Roberts, California in July of 2016. Sergeant Major Jiroch assumed the billet of Battalion Sergeant Major for 2/23 on 14 August 2016.
Sergeant Major Jiroch’s personal awards include the Navy and Marine Corps Commendation Medal with gold star in lieu of second award.