His first consulting job was at
McKinsey & Company in 1977 in
Amsterdam. At the company, he transitioned the ownership of the firm from a trust to an employee-owned model. Moynihan wrote a charter of ethics that was mandatory for employees to sign up to. He was credited for turning around the company in the 1990s. Moynihan retired at the end of 2013 as chairman, having run PA for some 22 years, but remained as chairman and a principal of its venture capital arm, Ipex Capital. valuing PA at $1 Billion. From 1995 on, he founded, chaired and brought to success numerous startup companies.
Political activities Euroscepticism and Brexit Moynihan supports
Brexit. Prior to the
2016 referendum, he was a member of the
eurosceptic campaign group
Business for Britain and sat on its board. While at Business for Britain, he was chairman of the editorial board, and came up with the name for Business for Britain's 1,000+ page argument for Brexit, "Change, or Go".
Support for Liz Truss Moynihan was the main fundraiser of
Liz Truss's leadership campaign in the
July–September 2022 Conservative Party leadership election, which led to Truss becoming prime minister in September 2022. Moynihan was against the view that a budget could not be produced without an accompanying
Office for Budget Responsibility (OBR) forecast. He said: "This whole idea that you have to get the tick of approval from the OBR, which has been consistently wrong in its financial forecasts is, in my view, anti-democratic."
House of Lords Moynihan was nominated by Truss for a
life peerage in
her list of resignation honours. He was created
Baron Moynihan of Chelsea, of Chelsea in the Royal Borough of Kensington and Chelsea, on 6 February 2024.
Other In June 2019, he donated £100,000 to
Boris Johnson during the
2019 Conservative Party leadership election. He has campaigned for the Electoral Commission to be abolished. ==Voluntary activities, and honours==