During the Boer War the Royal Engineers were constantly in the thick of the fighting. Half of the 37th company were on the shell-riven and bullet-swept summit of Spion Kop on 24th January. The 7th company, with the Canadian Regiment, made the last grand advance at Paardeberg on the night of the 26th February.

The Army List of December 1900 shows the following units as in South Africa: The 5th to the 12th, the 17th, 20th, 23rd, 26th, 29th, 31st, 37th, 38th, 42nd, 45th, and 47th companies; the 1st Division Telegraph Battalion; A and C Troops Bridging Battalion; Field Troop, 1st Field Park, and 1st, 2nd, and 3rd Balloon sections.

The names of the men who served in the regiment are listed below