Finance/Defense Military pay Office (DMPO) is located at 5450 Strom Thurmond Boulevard, Room 129, Fort Jackson, SC 29207. Finance/Defense Military pay Office (DMPO) can be reached by their main phone number at (803) 751-6669. Alternatively, you can reach Finance/Defense Military pay Office (DMPO) by phone at (803) 751-4405. The listed DSN line is 734-6669. Visit the Finance/Defense Military pay Office (DMPO) website by clicking here.