Donald DePass

Ian Paul Fisher is a top attorney recognized by Best Lawyers in the practice area(s) of Native American Law. Ian Paul, 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 Ian Paul is held by other top lawyers in the same geographic and legal practice area.

Clients turn to David Kochanski when they require practical and cutting edge approaches to efficiently and economically achieve their business objectives. Clients hire him for their complex real estate transactions because he is not only a recognized leader within the field, but also because he is not afraid to make unconventional suggestions that he can back up with solid legal and business rationale. David’s clients trust his judgment and have confidence in his advice. David’s a...

Michael L. Sibarium is a top attorney recognized by Best Lawyers in the practice area(s) of Antitrust Law. Michael L., 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 Michael L. is held by other top lawyers in the same geographic and legal practice area.

John A.C. Keith is a top attorney recognized by Best Lawyers in the practice area(s) of Bet-the-Company Litigation, Commercial Litigation, Legal Malpractice Law - Defendants, Litigation - Trusts and Estates and Trusts and Estates. John A.C., who practices law in Fairfax, Virginia, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John A.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.

Jamie's representations have involved the taxation of financial instruments, the timing of income and deductions, corporate reorganizations, deductions for worthless investments, the substance-over-form and economic substance doctrines, civil tax penalties, and other areas of tax law. From 2006 to 2013, Jamie was a trial attorney with the Tax Division of the U.S. Department of Justice, where he was lead counsel for the government in over 100 civil tax cases, and he received two Outstanding At...

Vincenzo is one of the four founding partners of Rock Creek Energy Group. Vincenzo represents generation owners and developers, energy traders, private equity firms, financial institutions, and other investors on transactional, regulatory, and compliance matters involving the Federal Energy Regulatory Commission (FERC) and advises clients on the requirements of the Federal Power Act, the Public Utility Holding Company Act of 2005, and the Public Utility Regulatory Policies Act of 1978. ‍ ...

Dennis J. Quinn is a top attorney recognized by Best Lawyers in the practice area(s) of Ethics and Professional Responsibility Law. Dennis J., who practices law in Washington, District of Columbia, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Dennis J. is held by other top lawyers in the same geographic and legal practice area.

James M. Maynor, Jr. is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. James M., who practices law in McLean, Virginia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which James M. is held by other top lawyers in the same geographic and legal practice area.

Douglas W. Ell enjoys solving difficult problems relating to employee benefits. His creative redesign of one benefit program saved a client over $20 million each year and was recently approved by the IRS. He drafted the first 401(k) plan in professional sports. Mr. Ell has represented a number of nationally recognized corporations, unions and multiemployer plans. He has litigated nationally with great success and persuaded Congress to make important changes in employee benefits laws. He has s...