Former Suffolk DA Timothy Sini to lead Nixon Peabody litigation team
Former Suffolk DA Timothy Sini will run Nixon Peabody’s litigation arm from Melville on Sept. 1, a move that pushes a former county prosecutor into one of Long Island’s largest law practices.
Timothy D. Sini, the former Suffolk County district attorney from Melville, has been tapped to lead Nixon Peabody LLP’s litigation operation and join the firm’s Management Committee on Sept. 1. The appointment puts a former top county prosecutor and ex-police commissioner at the center of one of the region’s biggest legal platforms, with the firm describing the practice as a major New York and Long Island litigation hub.
Nixon Peabody announced the move on June 18, saying Sini will head its Litigation Department at the AmLaw 100 firm. Long Island Business News described the department as a 400-member litigation team, while the firm’s attorney bio says the Litigation Department includes more than 300 attorneys. Either way, the scale is clear: Sini is being handed a large platform that reaches well beyond Suffolk County’s courthouse circle.
Sini joined Nixon Peabody in 2022 as a partner in the Government Investigations & White-Collar Defense practice after serving as Suffolk County district attorney and, before that, as Suffolk County police commissioner. His rise through two of the county’s most visible law-enforcement posts has made him a familiar figure in Suffolk legal and political circles, and his new role keeps him rooted on Long Island while expanding his reach across the New York City metropolitan area.
The firm says Sini’s practice covers litigation, internal corporate and government investigations, white-collar defense and crisis scenarios in the New York City metropolitan area and Long Island. His background fits that mix: on the firm bio, Sini says he led internal investigations into agencies that had been rocked by historic scandals and helped develop corrective action plans. That experience is likely to matter in a practice where companies and public institutions often call when stakes are high and reputations are on the line.
Sini’s public-service résumé also carries electoral baggage and local familiarity. Newsday reported that Suffolk County Police Commissioner Timothy Sini, a Democrat, defeated Republican Ray Perini to win the Suffolk County district attorney race on Nov. 8, 2017. OpenGovNY lists him as admitted to the New York bar in 2006 and as a graduate of Brooklyn Law School.
The move underscores how senior Suffolk officials can move from public office into private practice roles that depend on government experience, political networks and crisis-management work. For Nixon Peabody, it places a former Suffolk DA in charge of a litigation bench with deep ties to Long Island’s legal and business community.
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