COL DiMarco has been a member of Armed Forces Insurance since 1990.

COL DiMarco's 27-year career with the U.S. Army began in December 1981, when she was commissioned into the Transportation Corps through the Clemson University ROTC. She has held a variety of command and staff positions, including staff positions at the DISCOM, 3d Armored Division, Frankfurt, Germany, and movement control officer of the 2d Armored Division, Fort Hood, Texas. In 1988, she took command of the 96th Transportation (Heavy Truck) Company, 13th COSCOM. Key assignments include S3 Operations Officer of the 75th Support Battalion, 194th Separate Armored Brigade, Fort Knox; Division Transportation Officer, 4th infantry Division, Fort Hood; Executive Officer for the 204th Forward Support Battalion, 4th Infantry Division, Fort Hood, and Commander, 835th Transportation Battalion, Naha, Okinawa. In 2007, she completed a two-year brigade command in Kaiserslautern, Germany, with the 1st Transportation Movement Control Agency (TMCA), 21st Theater Support Command.

COL DiMarco retired in 2009 from position of the Director of Department of Logistics and Resource Operations (DLRO) at the Command and General Staff College. She currently teaches leadership at the Command and General Staff College.

COL DiMarco received a bachelor's degree in Forest Management from Clemson University and a graduate degree in Mental Health Counseling from Western Kentucky University. Her military education includes the Transportation Officer Basic and Advanced Courses, the Strategic Mobility Planning Course, the Command and General Staff College Course, and Advanced Operational Arts Studies Fellowship where she earned a second graduate degree in military arts and sciences from the School of Advanced Military Studies (SAMS).