Enlisting in 1978, Chief Warrant Four John Engeman began his career as a 63H tracked vehicle mechanic. His first duty assignment was with HHC/3rd Infantry Division in Wurzburg, Germany.
Chief Warrant Four Engeman returned to the United States in 1984 and served as Maintenance Service Team Chief at Fort Knox, KY. He was next assigned to Program Executive Office, Close Combat Vehicle Materiel Fielding Team–Europe.
In 1989 he became a Warrant Officer and was assigned as the Automotive Maintenance Technician for the 59th Chemical Company, Fort Drum, New York. He deployed with the company to Operation Desert Shield/Desert Storm as part of the 457th Chemical Battalion.
In late 1992, he deployed from Fort Drum to Florida to support Hurricane Andrew disaster relief efforts. In 1992, he was assigned as the Battalion Maintenance Technician, 1-15 Field Artillery at Camp Casey, Korea.
Chief Engeman returned to Fort Drum in 1994 to serve as the Battalion Maintenance Officer for 3-62 Air Defense Artillery. In 1994 his unit alerted for deployment to Haiti as part of Operation Restore Democracy.
In 1997, Chief Engeman was assigned as the Support Maintenance Technician, 317th Maintenance Company, Vilseck, Germany. He deployed with the company in 1999 to Camp Bondsteel, Kosovo in support of Operation Joint Guardian.
Following his return from Kosovo, Chief Engeman was assigned as the Support/Staff Maintenance Officer, G4, 7th Army Training Command at Grafenwoehr, Germany.
Chief Warrant Four Engeman was assigned as a Senior Maintenance Technician Observer-Controller/Trainer in 1st Battalion, 312th Regiment, 78th Division (Training Support), Fort Bragg, NC in 2004. In 2006, Chief Warrant Four Engeman volunteered to deploy as an OC/T to assist the Iraqi Police in establishing security in Baghdad. Essential to this effort was his ability to train and mentor IP mechanics and supervisors in advanced electronic diagnostics, maintenance repairs and maintenance shop organization and operations. While on convoy on 14 May, 2006 Chief Warrant Four Engeman was killed by an Improvised Explosive Device.