Scott-Moncrieff joined the
Royal Engineers in March 1874 and served in Afghanistan from 1878–1880. He was an Instructor at the School of Military Engineering from 1893–1898. He was Commander of the Royal Engineers, China Expeditionary Force 1900–1901, taking part in the
relief of Peking and the Waziristan expedition on the
North West Frontier, India 1901–1902. He was Assistant Director, Fortifications and Works, Army Headquarters 1909–1911, and
Director, Fortifications and Works,
War Office 1911–1918. He was promoted to the rank of major-general on 1 October 1912, following the retirement of Major-General
Richard M. Ruck. He retired in 1918. He was appointed a Companion of the
Order of the Indian Empire in 1901 for services in China, a Companion of the
Order of the Bath in the
1907 Birthday Honours and a Knight Commander of the Order of the Bath (KCB) in the
1915 Birthday Honours. He was appointed a Knight Commander of the
Order of St Michael and St George (KCMG) in 1918 for valuable services rendered in connection with the War. ==Selected works==