In June 2000, Singh was selected to attend the United States Army War College in Carlisle, Pennsylvania in the United States. He performed well at the War College and was graded 'exceptional' in the course. After the course, he returned to India and was appointed Brigadier General Staff (BGS) of Jalandhar based XI Corps. He served in this appointment during Operation Parakram when Indian troops were mobilised on the border in the wake of the 2001 Indian Parliament attack.