CDR Propst was born and raised in Cumberland, Maryland and graduated from Old Town High School in 1987. He graduated from the University of Oklahoma in 1995 and reported to Pensacola, Florida for Naval Flight Officer training. Designated as a Naval Flight Officer in August 1997, he reported to VAQ-129 at NAS Whidbey Island, Washington for Fleet Replacement Squadron training in the EA-6B Prowler.
Upon completion of VAQ-129 training in September of 1998, he joined the VAQ-134 GARUDAS where he completed three deployments in support of Operation NORTHERN WATCH and Operation SOUTHERN WATCH. He also completed a combat deployment to Aviano, Italy, in support of Operation ALLIED FORCE.
In November 2001, CDR Propst reported to the Navy Personnel Command in Millington, Tennessee where he served as Rating Assignment Officer in the Enlisted Distribution's Aviation Assignments Branch. In February 2003, he reported to United States Central Command where he was assigned to the Iraqi Coalition Coordination Center and completed a 10 month Individual Augmentee assignment during Operation IRAQI FREEDOM.
In April 2004, CDR Propst reported to Mayport, Florida and served on Commander, Cruiser Destroyer Group Staff as the Electronic Warfare Officer and embarked on USS ENTERPRISE (CVN-65).
CDR Propst then reported to the LANCERS of VAQ-131 in September 2005, where he served as Training Officer, Safety Officer, Administrative Officer and Operations Officer. While attached to VAQ-131, he completed two Western Pacific deployments onboard USS ABRAHAM LINCOLN (CVN-72), flying missions in support of Operation IRAQI FREEDOM and the Global War on Terrorism.
In October 2008, CDR Propst reported to the United States Naval War College in Newport, Rhode Island and received a Master of Arts Degree in National Security and Strategic Studies.
In December 2009, CDR Propst reported to the United States Northern Command in Colorado Springs, Colorado where he was assigned to the Readiness Branch in the Operations Directorate. After a two-year tour at USNORTHCOM, he returned to NAS Whidbey Island for transition training in the EA-18G Growler and Reported to the Electronic Attack Weapons School as Executive Officer in August, 2012.
CDR Propst's personal decorations include the Defense Meritorious Service Medal, Air Medal (six Strike/Flight, two individal awards with combat distinguishing device), Joint Service Commendation Meal, Navy and Marine Corps Achievement Medal and serveral other unit and service level awards. CDR Propst has accumulated over 2000 hours of flight time and 480 carrier arrested landings.