David A. O'Neil

Franca Harris Gutierrez is Chair of the Financial Institutions Practice. She leads one of the country’s preeminent banking and financial services practices from the firm’s Washington DC office, where she advises domestic and international banks, mortgage servicers, student loan servicers, consumer lending companies and emerging financial services providers on complex regulatory, enforcement and transactional issues. Ms. Harris Gutierrez is an active member of the firm’s Cons...

Christopher Cestaro is a partner in the firm's White Collar Defense and Investigations Practice. Mr. Cestaro’s practice focuses on white-collar criminal matters, government enforcement actions, internal corporate investigations, due diligence reviews and compliance counseling. Mr. Cestaro’s unique experience includes more than eight years as a federal prosecutor focused on white-collar cases, three years working as a compliance counsel for a multinational oil services company and ...

David M. McCullough is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law. David M., who practices law in Washington, District of Columbia, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David M. is held by other top lawyers in the same geographic and legal practice area.

Jeffrey A. Lamken is a top attorney recognized by Best Lawyers in the practice area(s) of Appellate Practice and Commercial Litigation. Jeffrey A., who practices law in Washington, District of Columbia, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jeffrey A. is held by other top lawyers in the same geographic and legal practice area.

Michael L. Vogelsang, Jr., is a principal at The Employment Law Group ® law firm, where he frequently handles cases that involve whistleblower retaliation, employment discrimination, wrongful termination, and other workplace claims. Since joining the firm in 2007, Mr. Vogelsang has gained extensive experience representing federal employees. He specializes in navigating the administrative labyrinth of cases across dozens of departments and agencies, such as: the Department of Defense, the ...

Daniel Volchok's practice focuses on appellate litigation involving various areas of federal and state law, including arbitration, bankruptcy, civil rights, contracts, criminal law, due process, free speech, intellectual property, military law, Native American issues, preemption and tax. Mr. Volchok has filed numerous merits and amicus briefs in the US Supreme Court as well as state and federal appellate courts, and also participated in successful efforts to obtain or oppose certiorari.

David Dixon is the co-leader of Pillsbury’s nationally ranked Government Contracts & Disputes practice group, a five-time winner of the Law360 Practice Group of the Year. David concentrates his practice on counseling and disputes regarding the formation and administration of government contracts at the federal level.

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...

Sally Ann Hostetler is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation and Litigation - Construction. Sally Ann, who practices law in Reston, Virginia, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sally Ann is held by other top lawyers in the same geographic and legal practice area.

Marna S. Tucker has practiced law in the domestic relations field for almost forty years, and is a nationwide expert in complex divorces, domestic violence and prenuptial matters. She has been recognized several times as one of the "Top Divorce Lawyers" by the Washingtonian Magazine as well as one of the "Top Lawyers" in Washington, D.C. She was noted as one of the top divorce lawyers in the nation by Town and Country magazine. She is a Fellow of the prestigious American College of Trial Lawy...