A former Counsel to the New York State Attorney General, General Counsel to a major New York State agency and federal prosecutor, Hank Greenberg has handled numerous high-profile matters. He concentrates his practice on civil litigation, criminal and civil investigations, health law matters, and regulatory and administrative law.

From 2007 to 2010, Hank served as Counsel to former New York State Attorney General Andrew M. Cuomo. In that capacity, he worked on some of the agency's most significant litigation and public policy initiatives. He also served as General Counsel for the New York State Department of Health (1995 to 2000), where he was the chief legal advisor to the Commissioner of Health and administered an office of more than 100 attorneys engaged in virtually all aspects of administrative law.

In 2011, New York’s commissioner of education appointed Hank to serve, on a pro bono basis, as a special investigator to conduct a complete review of the Education Department’s processes and procedures for receiving, reviewing and investigating reports of alleged improprieties involving student assessments. Following a four-month investigation, Hank reported his findings to the New York State Board of Regents, which unanimously approved his recommendations.

Amongst the other government posts he has held, Hank served as Counsel to the Lieutenant Governor of New York State (1995), an Assistant United States Attorney (AUSA) for the Northern District of New York (1990 to 1995) and law clerk to then Judge (later Chief Judge) Judith S. Kaye of the New York Court of Appeals (1988-1990). As an AUSA, he prosecuted numerous federal criminal cases, including white collar crime and public corruption.

Hank has served on a number of professional committees and other bodies. Presently, he chairs the Third Department Judicial Screening Committee and the New York State Fair Advisory Board, and is a member of the State Judicial Screening Committee and the State Commission on the Restoration of the Capitol. He is vice president of the Historical Society of the Courts of the State of New York and editor-in-chief of its publication, Judicial Notice. He co-chairs the New York State Bar Association's Committee on Court Structure and Operations. He also is a Fellow of the New York Bar Foundation and a member of the New York State Judicial Institute on Professionalism in the Law and the Advisory Group of the New York State and Federal Judicial Council.

Hank is a frequent lecturer and has been published several times on a wide range of legal subjects, including health law, administrative law, constitutional law, criminal procedure, trial practice, appellate practice, legal history and judicial philosophy.