Matthew Chambers' practice focused on investment management matters. His clients included registered investment companies and investment advisers and private and offshore funds. Before joining private practice, Mr. Chambers served as Associate Director (Regulation) in the US Securities and Exchange Commission's Division of Investment Management. He joined the firm in 1999 and retired in 2016.

Until 1995, Mr. Chambers served as Associate Director (Regulation) in the US Securities and Exchange Commission's Division of Investment Management. In that capacity, he supervised three offices: the Office of Investment Company Regulation, which is responsible for the review of exemptive applications filed by investment advisers and investment companies; the Office of Regulatory Policy, which writes rules regarding the substantive regulation of investment companies; and the Office of Public Utility Regulation, which administers the Public Utility Holding Company Act of 1935. Mr. Chambers also directed the Division's task force that reexamined investment company regulation and drafted the 1992 report, Protecting Investors: A Half Century of Investment Company Regulation, which set the agenda for mutual fund regulation for several years.

From 1995 to 1999, Mr. Chambers was with Debevoise & Plimpton, where he concentrated on mutual fund, private fund and investment adviser matters.