Tom Frederick, a former general partner with Venrock Associates, has joined the board of Occam Networks Inc.

Duncan Chapman joined Lexington Partners as a New York-based general partner. He was president and co-founder of Butler, Chapman & Co.

Ian Williams joined Robert W. Baird & Co.ís London office as a managing director and co-head of international M&A. He was managing director and head of the industrial manufacturing and automotive group at ABN AMRO in London.

Bernhard Schmid joined DVC Deutsche Venture Capital as a partner. He was a partner at VC firm Innotech GmbH.

Luke Imperatore has joined the alternative investments group of Putnam Lovell NBF Securities as a managing director based in New York. He previously served as a managing director with a fixed income hedge fund.

Fremont Partners, a San Francisco-based middle market private equity shop, has opened an office in Boston, and Mark Williamson, a managing partner with Fremont, reportedly will move east to lead the new site.