United States Attorney Erin Creegan Announces Her Senior Leadership Team

United States Attorney Erin Creegan Announces Her Senior Leadership Team

CONCORD – U.S. Attorney Erin Creegan has announced appointment and onboarding of her leadership team for the U.S. Attorney’s Office.

USAO - NH Leadership Team: Ryan Martin; Raphael Katz; Erin Creegan; Jennifer Cole Davis; Kiersten Korczynski; John Kennedy

Kiersten Korczynski – First Assistant United States Attorney.  U.S. Attorney Creegan has appointed Kiersten Korczynski to serve as the First Assistant United States Attorney for the District of New Hampshire. Ms. Korczynski formerly served as a Trial Attorney in the Department of Justice National Security Division, Counterterrorism Section where she managed high-profile international terrorism prosecutions, coordinated the investigative efforts of federal and state law enforcement agents, and developed strategies to protect classified information at trial. Before the Department of Justice, Ms. Korczynski served ten years in the U.S. Navy Judge Advocate General’s Corps as a defense counsel representing servicemembers in military courts-martial and as a prosecutor in the Guantanamo Bay trial of the five al-Qaeda members accused of orchestrating the September 11, 2001 attacks. Prior to joining the U.S. Attorney’s Office, Ms. Korczynski worked as in-house counsel for Exxon Mobil Corporation, recently serving as General Counsel for its Indonesian operations. She is a graduate of the Catholic University Columbus School of Law.

Jennifer Cole Davis – Chief of the Criminal Division. U.S. Attorney Creegan has asked Assistant U.S. Attorney (AUSA) Davis to continue her service as Criminal Division Chief for the District of New Hampshire after her initial appointment in February of 2024. A 32-year veteran of the office, Ms. Davis has conducted numerous complex long-term narcotics investigations as the District’s Organized Crime Drug Enforcement Task Force Coordinator and National Opioid Coordinator. She has also served as Criminal Division Deputy Chief and a mentor to her colleagues as Senior Litigation Counsel. Ms. Davis has prosecuted a broad range of federal offenses, including firearms violations, drug trafficking crimes, immigration offenses, and complex white-collar matters. Earlier in her career, Ms. Davis was detailed as an Assistant Director for Criminal Programs at the U.S. Department of Justice’s Office of Legal Education, where she oversaw the implementation of criminal trainings for the country’s federal prosecutors. She is a graduate of the Marquette University Law School.

John Kennedy – Deputy Chief of the Criminal Division. U.S. Attorney Creegan has asked AUSA John Kennedy to continue his service as Criminal Division Deputy Chief for the District of New Hampshire after his initial appointment in December of 2024. Mr. Kennedy has more than a decade of experience as a prosecutor in New Hampshire, serving as both an Assistant United States Attorney and an Assistant Attorney General. In these roles, Mr. Kennedy has led investigations into a variety of federal and state crimes, including homicide, voter fraud, drug and firearm offenses, and complex financial fraud. He is a graduate of Notre Dame Law School.

Raphael Katz – Chief of the Civil Division. U.S. Attorney Creegan appointed AUSA Katz to serve as Civil Division Chief for the District of New Hampshire in December of 2025 following his initial appointment as Acting Chief in May of 2025. Mr. Katz also serves as the Affirmative Civil Enforcement Coordinator. He has successfully resolved healthcare fraud, customs fraud, and financial fraud cases, as well as drug diversion and civil rights enforcement matters, recovering millions of dollars on behalf of the United States. Prior to joining the U.S. Attorney’s Office in 2019, Mr. Katz worked in private practice for more than thirteen years handling False Claims Act cases and other complex litigation. He is an Honors graduate of Emory University School of Law.

Ryan Martin – Administrative Officer. U.S. Attorney Creegan appointed Ryan Martin as the Administrative Officer for the District of New Hampshire in January of 2026. He is responsible for supervising the budget, facilities, procurement, human resources, IT, and records management resources for the U.S. Attorney’s Office. Since joining the U.S. Department of Justice in 2022, Mr. Martin has served as the Administrative Services Specialist, Contracting Officer, and District Office Security Manager. Prior to joining the U.S. Attorney’s Office, Mr. Martin had a 23-year law enforcement career, where he earned the rank of Captain in the Tilton Police Department.

“I am so pleased to be working with such a talented and dedicated group of public servants,” said U.S Attorney Creegan. “Since 1789, when President George Washington appointed the first U.S. Attorney for the District of New Hampshire, this office has served the people of this state. Every person in the U.S. Attorney’s Office works tirelessly to uphold the rule of law and keep New Hampshire safe, free, and prosperous. These leaders have accepted the responsibility of serving both their colleagues as well as their fellow Granite Staters. They represent our fulfillment of a 237-year old promise. New Hampshire is fortunate to have their leadership, and I am grateful for their service.”