Punter Southall has promoted Guy Plater, Martin Hunter and Mark Poyner to principal after demand for its actuarial and investment consulting grew.
The trio joined the senior management team on 1 January.
Plater has been an actuary for the firm's investment consulting business since 2003, and sits on its investment committee. He was previously an actuarial consultant at Mercer from 1996 to 2003.
Hunter joined Punter Southall as an associate in 2004 before moving to its transaction services business in 2006, where he is a senior consulting actuary.
Poyner is a senior consultant and scheme actuary at the firm's Birmingham offices, having joined in 2013. Prior to this, he was an actuary for Barnett Waddingham from 2005.
Chief executive John Batting said the promotions strengthen the firm's senior team.
"We're delighted to be making this latest round of promotions as we continue to strengthen our team across the business in response to growth in our actuarial and investment consulting business," he said.
"These promotions reflect our commitment in recognising and rewarding talent and our desire to offer clients access to unrivalled expertise so that we continue to help them work towards their strategic objectives with confidence."
The government has confirmed the current interim chairwoman of The Pensions Ombudsman (TPO), Caroline Rookes, will continue the role in a permanent capacity.
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.