On graduation in 1979, she joined the Public Service of Canada in Ottawa as an immigration adjudicator, later taking positions in the Department of Labour and the Privy Council Office. In the later position as Assistant Deputy Minister for Transport Canada, she was responsible for transport, overseeing the privatisation of Canadian National Railway and the deregulation of the Canadian airline industry. In 1996, she joined TD Securities as managing director of infrastructure finance and public private partnership. In 2000 she joined the Canadian Imperial Bank of Commerce as senior vice president and chief administrative officer, retail products. In 2003 she joined Bombardier as senior vice president, operational effectiveness, under CEO Paul Tellier. That same year she was named among the 100 most influential women in Canada by the National Post, and in 2004 as one of the Top 40 female corporate executives in Canada by the Ivey School of Business. After resigning from Bombardier at the end of 2004, following Tellier's departure, she was appointed President and Chief Executive Officer of Canada Post on May 12, 2005. During her period of tenure, she placed emphasis on cost cutting through cutting absenteeism, increasing automation and improved labour relations. The result was a trebling of Canada Post's profits to C$281 million, despite a 5.1 per cent drop in revenues, resulting in a two-year extension to her original five-year contract. However, in her last year of tenure, the Canadian Union of Postal Workers marked her fourth anniversary with a report card, with the CUPW's President Denis Lemelin commenting: "If you compare the four years before Greene with the four years under Greene's management, the numbers show that injuries have gone up 15.4% and grievances have gone up 59.3%." On May 27, 2010, Greene was appointed Chief Executive-designate of Britain's Royal Mail. Replacing the departed Adam Crozier from early July, the first non-Briton and first woman to hold the post, she oversaw the privatisation of Britain's postal service. Greene, who was in 2010 the highest paid UK Civil Servant on a basic salary of £498,000, is based in London. Her total compensation for 2012/13 was reported by the Royal Mail as £3.7 million. Greene is also a member of the board of directors for the coffee shop chain Tim Hortons. In February 2013 she was assessed as the 12th most powerful woman in Britain by Woman's Hour on BBC Radio 4. In August 2013 she repaid £250,000 in expenses she had claimed to fund buying house, this was after Business Secretary Vince Cable objected to the payment. Greene was named as Financial Times Person of the Year in 2014. Judge Luke Johnson said "She did a fantastic job managing the unions, politicians and media and floating the business last year. It was an almost impossible task to reconcile demands from all the competing stakeholders – and sell a declining business such as post and parcel delivery to the stock market – but she pulled it off."
Personal life
Greene has a grown-up daughter from her first marriage, which ended in divorce. She wed Dr. Roger Springall, a British physician, in June 2014. She lives in Fulham, London.
