From March 2003, Higgins was Chief Executive of English Partnerships. Higgins was appointed Chief Executive Designate of the Olympic Delivery Authority from December 2005,[8] and appointed Chief Executive with effect from 30 March 2006. In this role he was paid £394,999 a year, making him the highest paid Quango boss in the UK.[9]
On 28 September 2010, it was announced that he was leaving the Olympic Delivery Authority to take up the role of chief executive of Network Rail, taking over from outgoing chief executive Iain Coucher, and with effect from February 2011.[5] Higgins was widely respected for his work at Network Rail, including by the railway trade unions; he was succeeded as chief executive by Mark Carne in April 2014.[10]
In 2014, Higgins took over as chairman of HS2[3] Ltd from Douglas Oakervee. At HS2, he successfully oversaw the introduction and subsequent passing of the 400-page London-Birmingham High Speed Rail hybrid bill enabling the compulsory purchase and land acquisition for securing the chosen alignment.[11][12] As of 2015, Higgins was paid a salary of between £240,000 and £244,999 by the department, making him one of the 328 most highly paid people in the British public sector at that time.[13] Higgins stood down from HS2 in 2018.[14]
In 2012, Higgins was the chair of the 2012 British Construction Industry Awards judging panel which celebrated its 25th anniversary of rewarding excellence in UK construction delivery.[20]