Parry served as foundation chairman of the Independent Pricing and Regulatory Tribunal of New South Wales (IPART) for the 12 years to 2004.
Parry was made a member of the Order of Australia in January 2006 for his "service to public administration in New South Wales, particularly through the provision of advise to government on an economic regulatory, business promotion and industry issues."
In 2002 and 2003, he conducted the Ministerial inquiry into sustainable public transport in New South Wales. The inquiry's final report informs a significant amount of transport policy in New South Wales, including the corporatisation of Sydney Ferries, the reform of CountryLink, and reforms to the fare structure.
After leaving ]] in 2004, Parry joined Macquarie Bank to head up a new Community Partnerships Funds Management business. He moved to the Investment Banking Group in Macquarie in 2005 where he is Principal Adviser, Regulatory and is involved with Macquarie Group interests globally in regulated utilities and infrastructure.
Parry also serves as chairman of First State Super, Chairman of Sydney Water Corporation and a director of the Australian Stock Exchange, Market Supervision.