Timothy D. Sini is a member of the Litigation Department, Government Investigations & White Collar Defense practice group, and the COVID-19 Response Team.
With more than 15 years of experience in government investigations, crisis management, and litigation, I focus my practice on the following areas:
I handle a diverse array of matters involving government investigations or charges, including by agencies such as the Department of Justice, state attorneys general, and district attorneys. As a former federal prosecutor in the Southern District of New York and as the former Suffolk County District Attorney where I led one of the largest prosecutors’ offices in the nation, I have personally handled and supervised hundreds of complex investigations and prosecutions involving a wide range of crimes, including RICO, public corruption, environmental crime, fraud, financial crimes, organized crime, labor offenses, and much more. My investigative and litigation experience include matters that are multi-jurisdictional and international in scope.
As the former Police Commissioner of the Suffolk County Police Department and as the former Suffolk County District Attorney, I led internal investigations into each agency rocked by high-profile scandals and successfully developed and implemented corrective action plans.
With these unique experiences, I am able to protect my clients’ interests by conducting comprehensive investigations, proactively identifying risks, and developing remedial plans to ensure compliance and minimize future exposure.
I took over both the Suffolk County District Attorney’s Office and the Suffolk County Police Department in crisis: both agencies were led by individuals who have since been convicted of federal corruption offenses and were using their respective organizations in furtherance of their criminal schemes. As both Police Commissioner and District Attorney, I led massive internal investigations and instituted comprehensive corrective action measures, which restored the integrity and efficacy of both agencies. I also led the Suffolk County District Attorney’s Office during the worst of the COVID-19 pandemic. My proven success in crisis management allows me to swiftly and strategically advise and counsel individuals and entities facing all forms of emergent situations, including criminal, civil, regulatory, and/or reputational in nature.
I’ve personally handled numerous jury trials and other contested court proceedings. My experience includes trying federal felony cases to verdict, involving novel, complex factual and/or legal issues. I leverage this experience to help corporate and individual clients involved in civil and criminal litigation.
I assist clients in developing and implementing policies and protocols to ensure compliance with applicable law and regulations and to minimize future risk. As an example, in my government service, I instituted a digital case management system with electronic discovery, artificial intelligence, and data analytics, as well as a series of new policies to ensure compliance with once-in-a-generation law changes. My broad experience in complex investigations and prosecutions coupled with my in-the-trenches reform work positions me well to handle corporate compliance for clients.
Expect increased oversight and enforcement in connection with COVID-19–related issues both on the PPP side and in healthcare, as well as the PHE continuing to change its complexion, creating a constantly evolving regulatory environment.
Tim brings to his clients a truly unique blend of experience in investigations, litigation, and crisis management. He previously served as an Assistant United States Attorney in the Criminal Division of the U.S. Attorney’s Office for the Southern District of New York under U.S. Attorney Preet Bharara; the District Attorney for the Suffolk County (Long Island) District Attorney’s Office, one of the top 20 largest prosecutors’ offices in the nation; and the Police Commissioner of the Suffolk County Police Department, the 11th largest police department in the nation. Tim has been recognized as an expert in investigations and prosecutions, testifying before the President’s Commission on Law Enforcement & the Administration of Justice; the U.S. House of Representatives, Subcommittee on Counterterrorism and Intelligence; and the U.S. Senate, Committee on the Department of Homeland Security and Government Affairs. Tim also served on the White House’s Office of National Drug Control Policy, NY/NJ Regional High Intensity Drug Trafficking Area (HIDTA) Team where he worked with law enforcement, diversion investigators, and regulators to enhance compliance with the Controlled Substances Act and reduce drug overdoses in the region. He uses his past experience to represent a diverse client base, including entities, individuals, and executives, in all types of investigations, litigations, prosecutions, and crisis management situations.
American University, B.A., magna cum laude
Brooklyn Law School, J.D., magna cum laude
Federal Bureau of Investigation National Executive Institute Certificate in Executive Leadership, Law Enforcement (2017)
Harvard University, John F. Kennedy School of Government, Decisionmaking Certificate, Executive Education (2017)
This article highlighting prominent Long Island business news from 2022 includes the arrival of Long Island Government Investigations & White-Collar Defense partner Tim Sini to NP, noting his previous role as Suffolk County District Attorney.
Long Island Government Investigations & White-Collar Defense partner Tim Sini is featured in this article as one of the publication’s “2022 Long Island Power 100,” recognizing influential individuals shaping the island’s future. The article notes Tim’s tenure as Suffolk County District Attorney, highlighting his indictment of 96 MS-13 gang members and associates.
This article mentions Long Island partner and Labor & Employment practice leader Tara Daub, Government Investigations & White-Collar Defense partner Tim Sini, and Affordable Housing & Real Estate partner Sami Groff, who were all named “Top Lawyers of Long Island” for 2022 by the publication’s parent company. NP was also one of four firms honored this year.
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