Wilens to Assume Fidelity Retirement Unit Post

Family health problems have prompted an executive in Fidelity Investments’ workplace investing client management group to take a leave of absence starting at the end of the year, the Boston investment firm said.

Fidelity spokesman Vin Loporchio said Mike Wilens, head of Fidelity’s asset management unit, will replace Scott David, who Loporchio said needs to attend to his family’s medical issues. They will start the transition immediately, according to Fidelity.

Loporchio said Jacques Perold, chief operating officer of the asset management group, will take over Wilens’ role.

In 2006, Wilens went to work at Fidelity, where he has supervised Fidelity Management & Research Company, Pyramis Global Advisors, and Strategic Advisers.