 Kriegler served three times as Chairman and Secretary of the Johannesburg Bar Council, and as Secretary of the General Council of the Bar of South Africa.He drafted the constitution of the Christian Institute of Southern Africa, became National President of Verligte Aksie and founding Chairman of Lawyers for Human Rights.For some years he served on the Transvaal Board of the Urban Foundation and from 1978 to 1988 was a founding trustee of the Legal Resources Centre.