Sarah Smart, who is chairwoman of The Pensions Regulator's (TPR) audit committee, has been appointed senior adviser at Avida International.
The appointment is effective as of 5 March.
In addition to her new role, Smart will continue to chair TPT Retirement Solutions, a role she took on in April 2010. She is senior independent director on TPR's audit committee, a position she has held since February 2016, and also chairs the Financial Times Pensions Governance Committee.
Speaking on her appointment, Avida International managing director Bart Heenk, said: "Sarah is a real thought leader, who never takes the status quo for granted.
"She was also our first client in the UK when we started here five years ago and I think we must have done something right that she is now joining us".
Smart said: "I am delighted to be joining the Avida team to help advance the development of investment governance in the UK.
"I believe there remains much work to be done to ensure that the institutional investment market really works in the best interests of scheme members and the work that Avida does makes a huge contribution to making that happen."
Last year, Smart was appointed to the Financial Conduct Authority's institutional disclosure working group.
Previously, Smart has held a number of trustee roles on both private and public sector schemes, including trustee of the Macmillan Cancer Support pension scheme from 2007 to 2010.
She has also chaired the collective defined contribution section of the Department for Work and Pension's defined ambition initiative from 2012 to 2013.
The Pensions Regulator’s head of master trust authorisation Kim Brown has left the watchdog to join Legal & General Investment Management and run the L&G Mastertrust and its IGC.
Phoenix Group chief executive Clive Bannister is to leave the business and be replaced by ex-Aviva boss Andy Briggs next March.
The Combined Nuclear Pension Plan (CNPP) has appointed Aon Hewitt as an investment adviser for its defined benefit (DB) section, replacing Hymans Robertson.
Pension Protection Fund (PPF) chief financial officer Andy McKinnon is stepping down from his role after seven years.