PLSA 's commercial services director Julian MUND will continue to assume executive duties until the association appoints a permanent successor.
"My proudest achievements have included creating the Pension Quality Mark, establishing the Pensions Infrastructure Platform, increasing the association's income by 40% and making our conferences and events the best in the industry.
"Working with the PLSA's members I have given the association a new and wider focus, reflecting the realities of retirement saving today, culminating in the rebranding of the NAPF as the PLSA in 2015," she said.
In fact, under her more than one decade lasting leadership, the organisation and wider pensions sector has been through considerable change, including a major rebranding operation in October 2015 when changing its name from The National Association of Pensions Funds (NAPF).
SEGARS first joined the then NAPF in 2005 from the Association of British Insurers to work as director of policy, before becoming chief executive in 2006. Currently she is member of the PensionsEurope's Board, after chairing the private pensions providers' federation between 2012 and 2015.
PLSA chief executive and chairwoman Lesley WILLIAMS added: "Joanne has been an outstanding chief executive of the PLSA and has made a huge difference, as she campaigned for a secure future for pensions and pensioners in the UK and the EU. We wish her well in this new and exciting phase of her career."