David M. Knasel

Maureen is an experienced litigator who co-chairs the firm’s Litigation Practice Group and Class Action Practice Group. Maureen devotes a very substantial amount of her practice to wage and hour issues, including preventive consultation, internal audits, government investigations, and defense of wage and hour litigation, almost all of which include class or collective action claims. Maureen's wage and hour litigation experience includes cases involving state and federal minimum wage and...

Joel C. Rush is a top attorney recognized by Best Lawyers in the practice area(s) of Health Care Law. Joel C., who practices law in Washington, District of Columbia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joel C. is held by other top lawyers in the same geographic and legal practice area.

Dan Attridge has practiced in Kirkland's Washington, D.C., office since 1980 and served as the managing partner of the Washington, D.C., office from 1998 to 2013. He is a very experienced trial and appellate lawyer who has litigated cases before federal and state courts, administrative agencies, and arbitration panels throughout the United States. His cases have involved a wide range of industries and practice areas, including intellectual property; antitrust and unfair competition; commercia...

David Brown is co-chair of the firm’s corporate practice area, which includes its corporate, energy, finance, health care, real estate and public policy groups, and a partner in the Financial Services & Products Group, which he previously led. His practice focuses on mergers and acquisitions, corporate governance, securities disclosure, and payment system and other technology transactions, with an emphasis on the financial services, technology and telecommunications industries. Davi...

Daniel C. Neustadt is a top attorney recognized by Best Lawyers in the practice area(s) of Trademark Law. Daniel C., who practices law in Washington, District of Columbia, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Daniel C. is held by other top lawyers in the same geographic and legal practice area.

David is the managing partner of the Washington, D.C. office, as well as the co-leader of the Investment Management Group. Prior to joining Sullivan & Worcester, David was Special Counsel in the Washington, D.C. office of Gibson, Dunn & Crutcher. He previously served as Assistant General Counsel for Legislation and Investment Company and Adviser Regulation at the Securities and Exchange Commission and as Counsel to SEC Commissioner Aulana Peters.

O'Kelly E. McWilliams III is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. O'Kelly E., who practices law in Washington, District of Columbia, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which O'Kelly E. is held by other top lawyers in the same geographic and legal practice area.

John's practice focuses on the representation of mutual funds, exchange-traded funds (ETFs), closed-end funds and business development companies (BDCs) and their independent board members. He advises clients on a range of matters, including the formation, operation, merger and liquidation of mutual funds, closed-end funds, ETFs, and BDCs. John has extensive experience working on transactions involving registered funds, such as adviser acquisitions, fund adoptions and product launches.

Will Planert is a Partner in the firm’s International Trade practice. He concentrates on representing multilateral and foreign-based corporations in a wide variety of international trade disputes, including antidumping and countervailing duty investigations, Section 201 (safeguards) cases, anticircumvention investigations, and customs compliance matters. Mr. Planert appears regularly before the U.S. Department of Commerce, the U.S. International Trade Commission, and the U.S. Bureau of ...

An expert on ERISA’s fiduciary rules and government regulation of health insurance, including the Affordable Care Act (ACA), Jon Breyfogle counsels numerous financial services firms, health insurers, and their D.C.-based trade associations on retirement and health matters. His practice includes advice on regulatory and legislative strategies, compliance, and defense of federal and state investigations. Jon has testified before Congress and at Department of Labor hearings on both retirem...