After graduating from Oxford in 1974, Walker become a TV journalist with
TV One in New Zealand where he stayed for five years. During this time he presented current affairs programme
Tonight, on which he interviewed Prime Minister
Rob Muldoon, about his assertions regarding the
Soviet naval presence in the Pacific, and New Zealand vulnerability to Russian
nuclear attack. Muldoon, who had sought to give answers to questions which had already been submitted to him, resented Walker's line of questioning and snapped "I will not have some
smart alec interviewer changing the rules half way through." In 1979, he moved to the United States, where he was appointed a Knight Journalism Fellow at
Stanford University, California. He switched to politics, returning to New Zealand as Director of Communications for the
Labour Party. His time with the party saw it return to office under
David Lange, who defeated three-term incumbent
Rob Muldoon's
National Party in the
1984 election. Walker moved to Europe in the late 1980s, working for public relations firm,
Hill & Knowlton in London and
Brussels, and becoming a partner in
Brunswick Group in 1994. He returned to politics in 1996, working in the 10 Downing Street policy unit under Conservative Prime Minister
John Major. Between 2000 and 2002, Walker was Communications Secretary to Queen Elizabeth II, before returning to the private sector as a director at
Reuters and Chief executive of the
British Private Equity and Venture Capital Association. ==Institute of Directors==