Chief of Army Staff (CAS) (Bengali: সেনাবাহিনী প্রধান, romanized: Senabahini Prodhan) of Bangladesh Army, also known as Army Chief, is the highest-ranking officer of the Bangladesh Army. The Chief of Army staff has been a four-star rank since 2007. Maj. Gen. M. A. Rab (the then Lt Col) was the Chief of StafSiyam The office of the Chief of Army Staff functions from the Army Headquarters, which is located in the Dhaka Cantonment.