Law firm Davis Polk & Wardwell recruited the Securities and Exchange Commission's former enforcement chief and another former high-level government lawyer to join its white-collar defense group, part of an effort to expand its Washington practice.

Linda Chatman Thomsen, who left the SEC earlier this year, and Raul Yanes, former staff secretary to President George W. Bush, are joining the law firm as partners.

Both had worked at Davis Polk in New York before joining the government.

The duo will be the first litigators in the 11-person Washington office in years.

Former SEC Commissioner Annette Nazareth and Robert Colby, a former deputy director of the SEC's trading and markets division, also recently joined the firm's Washington office to focus on financial regulatory issues.

Davis Polk clients, including large financial institutions, are closely entangled with the government as it has pumped billions of dollars into financial rescue plans. Congress is studying new regulation of financial markets.