In October 1941, Powell was posted to Cairo and transferred back to the Royal Warwickshire Regiment. As secretary to the Joint Intelligence Committee, Middle East, he was soon doing work that would normally have been done by a more senior officer and was (May 1942, backdated to December 1941) promoted to major. He was promoted to lieutenant-colonel in August 1942, telling his parents that he was doing the work of three people and expected to be a brigadier within a year or two, and in that role helped plan the Second Battle of El Alamein, having previously helped plan the attack on Rommel's supply lines. Powell and his team began work at 0400 each day to digest radio intercepts and other intelligence data (such as estimating how many tanks Rommel currently had and what his likely plans were) ready to present to the chiefs of staff at 0900. The following year, he was appointed a Member of the Order of the British Empire for his military service.