Awards & Rankings 06.04.26
Pillsbury’s Standout Performance in 2026 Chambers USA Rankings Underscores Continued Excellence Across Industries and Disciplines
Firm Earned Recognition Across 60 Practice Areas, Including 26 National Rankings
Partner, Washington, DC & New York
Particular praise is leveled at William Sullivan … for his ‘strong advocacy skills’ as well as his ‘credibility and experience,’ which carry ‘tremendous weight when dealing with government regulators and enforcement attorneys.’
Bill Sullivan, Pillsbury’s Corporate Investigations & White Collar Defense Practice Group leader, is a former federal prosecutor and experienced trial attorney who concentrates his practice on internal investigations and white collar criminal defense, as well as complex civil litigation and other regulatory actions.
Commended by clients for his skill at “marshalling massive amounts of information and distilling it down to themes and talking points” (The Legal 500 U.S.), Bill has substantial experience in the courtroom, the boardroom and in between, representing public and private companies, as well as key executives and public officials in global corporate regulatory and internal investigations, parallel proceedings, trial and grand jury matters, congressional and independent counsel inquiries, public corruption matters and white collar criminal defense, with a particular emphasis on the Foreign Corrupt Practices Act (FCPA), antitrust and securities matters, international trade and export control, as well as the Foreign Account Tax Compliance Act (FATCA).
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Bill has been particularly successful on behalf of both companies and individuals in persuading government regulatory authorities to decline to pursue criminal prosecution or other enforcement actions involving a diverse array of matters. In 2018, the National Law Journal recognized Bill as a White Collar, Regulatory & Compliance Trailblazer. Bill has been mentioned multiple times by The American Lawyer in its “Litigator of the Week” column for successes on behalf of his clients.
Bill honed his courtroom skills while serving for more than 10 years as an assistant U.S. attorney for the District of Columbia. During his service, he tried several high-profile cases involving first-degree murder, perjury, fraud, obstruction of justice, money laundering, conspiracy, narcotics and criminal RICO charges. He was the lead prosecutor in the first federal death penalty case to be tried in almost 50 years in the District of Columbia. He has won over 70 federal criminal jury cases and has argued, and prevailed, in over 20 appeals in both New York and the District of Columbia. He won numerous Department of Justice (DOJ) awards and commendations.
Bill frequently prepares and advises on compliance and business strategy programs for companies engaged in industries as diverse as manufacturing, defense, telecommunications, finance, energy, pharmaceuticals and aerospace. Bill’s legal opinions and analysis are often sought by the national media regarding high-profile or sensational cases, and he has been consistently ranked as a superior practitioner by legal publications.
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Due to the nature of Bill’s practice, a large number of his most successful matters have resulted in public charges not being filed, and therefore remain confidential.
Honors & Awards
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Education
J.D., Cornell Law School, 1985
M.A., Tufts University, 1981
B.A., Tufts University
magna cum laude
Admissions
District of Columbia
Connecticut
New York
Courts
U.S. Court of Appeals for the District of Columbia Circuit
U.S. Court of Appeals for the Second Circuit
U.S. Court of Appeals for the Fourth Circuit
U.S. District Court for the Eastern District of New York
U.S. District Court for the Southern District of New York
U.S. District Court for the Eastern District of Michigan
U.S. District Court for the District of Connecticut
U.S. District Court for the District of Columbia
U.S. District Court for the Middle District of Florida