Paul Cuff has been appointed Xafinity managing director alongside Ben Bramhall.
Cuff (pictured), who joins from KPMG, is responsible for the consultancy's marketing and sales efforts.
He shares the role with existing managing director Bramhall, who is now responsible for the day-to-day running of the company.
He started in the role on 3 October.
Cuff said: "I am thrilled to join Xafinity, a firm with such a strong client base and fantastic people. The market for ongoing services demands ever more quality, efficiency and smarter solutions - Xafinity is extremely well placed to deliver on this for its clients and there are very exciting times ahead."
Chairman Robert Birmingham added Cuff's hiring was a "coup".
"He has extensive experience in the industry advising trustees and corporate sponsors on a wide range of pension matters," he said. "With his wealth of experience and expertise, he will be an asset to the firm."
Since 2004, Cuff had been partner and head of the London pensions team at KPMG.
Bramhall has been managing director since April 2014. Before that, he was director at KPMG from 2013 to 2014, marketing executive at insurance company Lucida between 2011 and 2012, and an associate partner at KPMG from 2004 to 2011.
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The Pensions Management Institute (PMI) has appointed three non-executive directors and an executive director to its board.
Former Financial Regulators Complaints Commissioner Antony Townsend is to become chair of an expanded Determinations Panel at The Pensions Regulator (TPR).
Six members of Ross Trustees’ pension trustee and support teams have been promoted into new roles.