Earlier this month Hartnett, who was permanent secretary at HMRC until last summer, came under scrutiny at a High Court hearing over a settlement he agreed with Goldman Sachs executives in 2010 to resolve a long-running dispute over a now-banned tax avoidance scheme – a so-called sweetheart deal. The court ruled the deal was lawful.
A spokesperson for Deloitte said: “Dave Hartnett will work as a consultant to Deloitte advising foreign governments and tax administrations, primarily in the developing world. He has significant experience in advising such countries on the development of effective tax regimes necessary to ensure their continued economic growth. He will not work with UK companies or with HMRC.”
He is also an adviser to HSBC, after joining the bank in January.