Business career • Director,
Telecom Corporation of New Zealand Limited 1999–2001 • Chairman,
Telecom Corporation of New Zealand Limited 1990–1999 • Deputy chairman,
Telecom Corporation of New Zealand Limited 1987–1990 • Founding chairman, New Zealand Trade Development Board 1986–1990 • Chairman, Venture Pacific Ltd 1986–1989 • Chief executive/managing director – Goodman Group Limited, and as a Director of its publicly listed associate companies 1976–1985 • Member Wellington Stock Exchange 1970–76 (Partner Harcourt Longuet & Co.) • Non-executive director/deputy chairman – A.S.Paterson & Co. Limited 1968–1976 • Directorships at various times of companies engaged in wholesale and retail distribution, food processing, transport, tourism, banking, life insurance, manufacturing (plastics and textiles, agribusiness, telecommunications and airlines
Other organisations • Young Enterprise Trust – trustee 2000–2008. • Founding chairman, Enterprise Education Trust 2000–2003 • Australia & New Zealand Business Council 1985–2001 Chairman 1988–1990 •
Samuel Marsden Collegiate School Board 1981–1987 • Manufacturing Development Council 1981–1984 • Wellington Rotary Club 1973–1977 • Wellington City Mission Board 1973–1995 Shirtcliffe was the founding chairman of the Enterprise Education Foundation and later a trustee of the Enterprise New Zealand Trust. He was an active member of the
Royal New Zealand Naval Volunteer Reserve from 1953 to 1967, reaching the rank of Lieutenant Commander. ==Electoral reform==