Kamal Tabet, the London-based global head of financial entrepreneurs at Citigroup and one of the most high-profile and best-regarded bankers in the private equity industry, is taking a sabbatical as the US investment bank reorganises his division.

The move comes as Citigroup merges its infrastructure division with its financial entrepreneurs business, which is unusually powerful as it includes fundraising, acquisitions, financing and exit activities for private equity firms and entrepreneurs in one group.