Philip Burdon worked as a legal advisor for Mobil Oil in Wellington in 1967.[2] In 1969, he and Roger Giles began a company growing mushrooms in caves on the Mediterranean island of Cyprus, but following the Turkish invasion of Cyprus in 1974, they concentrated all their efforts on their New Zealand company, Meadow Mushrooms, established at Prebbleton in 1970.[2][7] From 1977 to 1978, Burdon was a visiting lecturer in law at Lincoln College.[2]
While in Opposition, Burdon was the National Party spokesman for health from 1985 to 1986, and trade and industry between 1986 and 1990.[2]
Burdon was the New Zealand Minister of State Owned Enterprises from 1993 to 1996.[8] Other ministerial positions that he held were Minister for Trade Negotiations, Minister of Commerce, Minister for Industry, and Associate Minister of External Relations and Trade.[2]
As of 2009[update], Philip Burdon is chairman of the Asia New Zealand Foundation[9] and patron of the New Zealand China Friendship Society.[10]
Burdon and fellow former MP Jim Anderton were prominent campaigners for the restoration of ChristChurch Cathedral, which had been severely damaged in the February and June 2011 Christchurch earthquakes. They were ultimately successful in September 2017 when the Anglican synod made a binding decision to restore the church.[11]