He played a key role in the investigation of a failure in an earth dam for a new Metropolitan Water Board reservoir at Chingford being constructed by Mowlem.
[7][8] His proficiency in soil mechanics grew rapidly, inspired by his interactions with the Building Research Station group which included notable engineers such as Alec Skempton (Glossop & Skempton, 1945), Leonard Cooling, and George Meyerhof, as well as the renowned soil mechanics engineer Karl von Terzaghi.
This period marked significant advancements in soil mechanics, aided by his collaboration with Hugh Golder.
[13] The newly formed company initially served as a service provider to Mowlem's contracts, however the business areas soon expanded into work for other contractors, leading to its growth and the eventual establishment of a separate office, Glossop House, in Wokingham.
He played a pivotal role in the launch of the journal Géotechnique in 1948, after initial discussions at a meeting in a nightclub in The Hague with E.C.W.A Geuze and Hugh Golder in 1946.
[19][3] Glossop was a key figure in organizing the Fourth International Conference of the International Society for Soil Mechanics and Foundation Engineering in 1956 - 57 (Glossop, 1968), served as chair of the Federation of Civil Engineering Contractors in 1963-64, and served as Vice-President of the Geological Society in 1969.