Harold Tomlinson was born on 20 May 1899 and read architecture at Christ's College, Cambridge from where, after serving in the Royal Air Force in World War One, he graduated in 1922. He subsequently practised as an architect in Cambridge. He also taught for many years at the University of Cambridge School of Architecture and was on two occasions Deputy Director of the School.
In the early 1930s Tomlinson redesigned the interior of the Cambridge Union; with W. P. Dyson, he rebuilt the ADC Theatre in Cambridge which had been gutted by fire in 1933; and in 1936-37 he designed the main building for Cambridge Airport.
Tomlinson was elected an Associate of the Institution of Structural Engineers (A.I.Struct.E.) in 1926; an Associate of the Royal Institute of British Architects (ARIBA) in 1929; and a Fellow of the Royal Institute of British Architects (FRIBA) in 1933.
Tomlinson lived in Cambridge throughout his career as an architect. In 1926 he married Margaret Tansley (c.1905-?) an architecture student. he died on in Cambridge, Cambridgeshire on 31 May 1951
‘Obituary’. The Builder vol. 180, 8 June 1951 p. 831
‘Obituary’. RIBA Journal vol. 58, August 1951 p.407