Pascal Villiger is leaving the California State Teachers’ Retirement System, where he has been a private equity portfolio manager for the past four years, Fortune has learned.

His next stop is Medley Partners in San Francisco, which manages private equity investments on behalf of Jim Simons (founder of Renaissance Technologies) and family. No word yet on who will replace Villiger at CalSTRS, which manages more than $21 billion in private equity assets. The alternative investment group will continue to be led by Margot Wirth.

Here is Villiger’s most recent bio:

Pascal Villiger is a Portfolio Manager and senior member of the private equity team responsible for managing CalSTRS’ private equity portfolio. Pascal is a member of investment committee responsible for private equity investment selection and portfolio construction decisions. Pascal directly manages and monitors over 35 private equity partnership representing over $7.5 billion in committed capital across the buyout, distressed and venture sub-asset classes. Prior to joining CalSTRS in 2008, Pascal spent 11 years as an investment banker, most recently as an Executive Director at UBS. Prior to that, Pascal was a Director in Investment Banking at Banc of America Securities LLC.

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