During the Second World War he joined the British Army, travelled to England, and transferred to the Royal Corps of Signals. Within a year he was promoted to lieutenant, in charge of a platoon. Trained to be involved in the D-Day landings, in 1944 he was posted to India for the remainder of the war. After the war, Muggleton returned to Southern Rhodesia where he was placed in charge of founding the Post Office Engineering College in 1950. In 1961, following an interchange of letters with Sir Edward Appleton, he was invited to take up a position on the staff of the Department of Electrical Engineering at the University of Edinburgh (1961-1973). At this time he began to provide technical assistance in short wave frequency selection and antenna design for Trans World Radio. In 1973 he returned to Africa to found the Faculty of Engineering at the University of Rhodesia, as a Professor and Dean of Faculty. Following serious injuries in a campus-based terrorist attack, he moved back to the UK in 1980, taking up a position as Director of the British Branch of Trans World Radio and overall Director of the Propagation Department. Muggleton retired to take up an honorary position at the University of Exeter in 1992.
