Richardson was a partner in the Invercargill firm of Macalister Brothers from 1957 to 1963. From 1963 to 1966, he was Crown Counsel in the Crown Law Office in Wellington. He then joined the Victoria University of Wellington. He was Professor of Law, between 1967 and 1973, during which period he served as Dean of the Law Faculty from 1968 to 1971.[2]
He was a Distinguished Fellow at Victoria University.[4]
Influence on New Zealand taxation
Richardson has had significant impact on the development of New Zealand tax law and policy. During his time on the Court of Appeal he delivered most of the majority decisions on the significant tax cases of the time. For example, his ruling in CIR v Farmers' Trading Co Ltd (1982) 5 NZTC 61,200 was instrumental in the development of reference to accounting concepts in determining taxable income.[5]
Richardson was the Chairman of the Council of Legal Education from 1983 to 1992. He also served as Pro Chancellor (1979 to 1984) and Chancellor (1984 to 1986) of the Victoria University of Wellington.