[10] In 1986, he joined Security Pacific Hoare Govett as a Vice-President and left them in 1987 to set up Egan Associates,[4] a business providing training courses to financial institutions.

Moylan was responsible both for bringing the organisation's finances back into order and for terminating the public-private partnership initiated by the Blair government, brought to a close in May 2010 with TfL's acquisition of Tube Lines from Ferrovial and Bechtel.

[21] In August 2013, Moylan was appointed to the board of Crossrail as a non-executive director, replacing Sir Mike Hodgkinson as the Transport for London nominee.

[23] In July 2015, as the Mayor's adviser on the project, he stated that "delay should not be an option," as London is growing at the rate of two inhabitants an hour, and that by 2030 would have a population of ten million.

Within London, Moylan has promoted new approaches to streetscape drawn principally from the Dutch "shared space" concept developed by Hans Monderman.

[29] Plans for a similar improvement of Sloane Square in Chelsea proved controversial and were shelved in 2007, after a campaign against them,[30] but a clutter-free redesign of Exhibition Road, in London's museums district, was achieved in 2012.

[33] Until he left these roles in June 2012, Moylan oversaw many improvements to highways and parks around the capital, including the restoration of Piccadilly and St James's Street to two-way traffic.

[43] Giving evidence to the House of Commons Transport Committee, Moylan spoke of "tremendous potential for regeneration of east London" from a new hub airport in the Thames estuary.

[45] In October 2015, in giving evidence to the Environmental Audit Select Committee of the House of Commons, he said that an extra runway at Heathrow would cut the respite from flights allowed to local residents to as little as four hours a day.

Summing up his earlier life, he commented "Many people can point to a career that is a sort of linear progression, whereas mine has been more a series of happy stumbles.

[3] In 2008 Moylan was elected an Honorary Fellow of the Royal Institute of British Architects,[26] which issued a press release to explain the honour.