Goldman, Sachs & Co. co-president and co-chief operating officer Jon Winkelried will retire and leave the board on March 31. He will retain the honorary title of senior director. This leaves Gary Cohn as sole president and COO.

Winkelried, 49, joined Goldman in 1982, and became co-president in 2006. Before that, he was co-head of the investment banking division. From 2000 to 2005, he was co-head of fixed-income, currency and commodities and was head of FICC in Europe from 1999 to 2000. From 1995 to 1999, he was responsible for Goldman Sachs' leveraged finance business.

Winkelried (pictured) planned to retire earlier for personal reasons, but stayed on as markets deteriorated.

Société Générale Corporate & Investment Banking announced a new management structure. The core executive committee comprises Thierry Aulagnon, head of the corporate, institutions and advisory division; Christophe Mianné, who is now head of global equity and derivatives solutions and of fixed income, currency and commodities; Jean-Luc Parer, head of capital raising and financing; a chief operating officer to be appointed; and Slawomir Krupa, chief of staff in charge of strategy.

Olivier Khayat, who was head of FICC, will take another role at the bank. SG CIB deputy chief executive Patrick Soulard has left to pursue other interests.

Investment bank Sandler O'Neill + Partners LP, which specializes in financial services companies, hired William Burgess III as a managing director in the investment banking group. Burgess focuses on depositories and insurance institutions. He will be based in Chicago and also work from the New York headquarters.

Burgess joined the financial institutions group of Goldman, Sachs & Co. in 1998 and was a managing director, covering Midwestern financial institutions. Before Goldman Sachs, Burgess was a lieutenant in the U.S. Navy from 1994 to 1998.

Wall Street analyst Richard Bove left Ladenburg Thalmann Financial Services Inc. for Rochdale Securities LLC. Bove cited Ladenburg Thalmann's concessions in a defamation lawsuit he was involved in as the reason for his departure. He covers the financial services and banking sector.

Also joining Bove at Rochdale as institutional salespersons are Joseph Bove and Andrew Massey.

In New York, Richard Burke joined Jefferies & Co. as a managing director in the mergers and acquisitions group of the investment banking division. Burke was a partner at Tower Three Partners, a Greenwich, Conn., private equity firm. Before that, he was a managing director in investment banking at Gleacher Partners, where he focused on M&A.

Earlier, Burke was a corporate attorney at Cravath, Swaine & Moore LLP.

Debevoise & Plimpton LLP said Michael Mukasey, who has served as U.S. Attorney General, will join the firm's litigation department in New York as a partner later this month. Mukasey served on the bench of the U.S. District Court for the Southern District of New York for 18 years, six as chief judge. Mukasey then served as the nation's chief law enforcement officer, overseeing the Department of Justice.

Theodore Posner, former director of international trade and investment for the National Security Council, joined Crowell & Moring LLP's international trade group as a partner.

Allen & Overy LLP announced that John Kibler and Angela Somers joined its U.S. restructuring practice as senior counsel in New York. Kibler was counsel with King & Spalding LLP and was vice president at Raymond James & Associates Inc., working in the recapitalization and restructuring investment banking group. Somers was special counsel at Cadwalader, Wickersham & Taft LLP and counsel at LeBoeuf, Lamb, Greene & MacRae LLP.

Quarles & Brady LLP formed a national stimulus legislation and opportunities task force to advise on opportunities under the American Recovery and Reinvestment Act of 2009.

Particular areas of coverage include construction and infrastructure, healthcare, public finance and schools, energy and science projects, tax relief, municipal bonds and Native American infrastructure projects.

Robins, Kaplan, Miller & Ciresi LLP added three entertainment and media lawyers as special counsel in Los Angeles: Marcia Harris, Samuel Pryor and Bridgette Taylor. They join partners Michael Plonsker, Yakub Hazzard and Mark Passin and associates Lauren Sudar, Rori Silver and Jeanine Wright, all of whom recently joined to launch the firm's entertainment and media practice.

All nine lawyers were previously with Dreier Stein Kahan Browne Woods George LLP in Santa Monica, Calif.

Curtis, Mallet-Prevost, Colt & Mosle LLP welcomed Maryann Gallagher as counsel in its restructuring and insolvency group. She will work in the New York office and represents both debtors and creditors. Before joining Curtis, Gallagher was a consultant at NYSE Euronext Inc.

Litigator Abraham Rudy joined litigation and business law firm Carroll, Burdick & McDonough LLP as a partner. He spent more than 10 years with Beverly Hills firm Weissmann Wolff Bergman Coleman Grodin & Evall.