The Pension Protection Fund has appointed Alan Rubenstein as its new chief executive.
The PPF told PP that Dasgupta would stay on in an advisory role until his contract comes to an end in June.
Pension Protection Fund chairman Lawrence Churchill said: "I am delighted that we have been able to attract someone of Alan's calibre. He brings to the role a wealth of knowledge and experience of the financial markets and the pensions industry that will help ensure that the PPF continues to deliver financial security in retirement for thousands of pension scheme members across the UK."
Alan Rubenstein added: "I am very pleased and honoured to have the opportunity to lead this vitally important organisation. I am confident that with the quality foundations that have already been laid, the PPF is well-equipped to rise to the challenges that lie ahead and deliver on its objectives."
Prior to joining the PPF, Rubenstein was a managing director at Lehman Brothers and responsible for establishing their Pensions Advisory Group, which promoted the firm's equity, fixed income and investment banking services to pension funds and corporate plan sponsors.
He qualified as an actuary with Scottish Widows and then moved into senior executive positions in investment banking with BZW Asset Management, Lucas Varity Fund Management and Morgan Stanley.
Rubenstein is a former vice-chairman of the National Association of Pension Funds, and chairman of its investment council. He is on the Management Board of the UK Actuarial Profession and a council member of the Faculty of Actuaries, and is a former member of the Takeover Panel.Professional Pensions
Feasibility study due
'Let’s be bold enough to demand change'
Joint life second death option added to relieve tax burden on couples gifting assets
Backed by Schroders, LGIM and the IA
New system for funds without without three-year track record