[1][2] He previously served as the Chief of the Transportation Corps, headquartered at Fort Lee in Virginia.

He holds a Bachelor of Arts in Business Management from the University of Tampa, a Master of Science in Logistics Management from the Florida Institute of Technology and a Master of Strategic Studies from the United States Army War College.

Drushal is also a graduate of the Transportation Officer Basic Course, Combined Logistics Officer Advanced Course, Command and General Staff College, the Logistics Executive Development Course, the United States Army War College, and the Army Senior Leader Seminar program.

In Kuwait, then Lieutenant Colonel Drushal commanded Joint Logistics Task Force 57, which consisted of multiple Active Army, Army Reserve, and Air Force elements conducting logistics patrols to and from Iraq.

He also conducted temporary duty at New Orleans International Airport in support of state and national-level relief operations resulting from damage caused by Hurricane Katrina.