[1] He became a chartered accountant, senior partner of a firm (Hesketh, Hardy & Hirshfield), and was investment adviser to the Trade Union Congress advising unionists like Frank Cousins and Vic Feather.
From the 1950s he became the consultant of leading Labour Party figures such as Herbert Morrison, Nye Bevan and Harold Wilson.
[2] He also served as Deputy Chairman of the Northampton New Town Corporation, on the Salary Review Body and the Committee on Consumer Credit.
[2] Hirshfield believed that capital and labour had a common interest and should act as one, and worked hard to prevent the adverse effects of new technological developments on general employment.
[3] Latterly he became President of Norwood, a Jewish orphanage charity originally based in the east end, and served on the Chevening Trust which oversaw the restoration of the house for the nation.