U.S. Attorney Erin Creegan has named her senior leadership team for the District of New Hampshire, with several experienced attorneys and professionals taking on key roles in the U.S. Attorney’s Office.
Kiersten Korczynski has been appointed as First Assistant United States Attorney. Korczynski previously worked as a Trial Attorney in the Department of Justice National Security Division, Counterterrorism Section, where she managed international terrorism prosecutions and coordinated investigative efforts among law enforcement agencies. Her background also includes a decade in the U.S. Navy Judge Advocate General’s Corps, where she served as both defense counsel and prosecutor, including participation in the Guantanamo Bay trial of five al-Qaeda members accused of planning the September 11 attacks. Before joining the U.S. Attorney’s Office, Korczynski was General Counsel for Exxon Mobil Corporation’s Indonesian operations.
Jennifer Cole Davis will continue to serve as Chief of the Criminal Division after her initial appointment in February 2024. Davis has spent 32 years at the office and led numerous narcotics investigations as Organized Crime Drug Enforcement Task Force Coordinator and National Opioid Coordinator. She has prosecuted a wide range of federal offenses such as firearms violations, drug trafficking crimes, immigration offenses, and white-collar cases.
John Kennedy remains Deputy Chief of the Criminal Division following his appointment in December 2024. Kennedy brings over ten years’ experience prosecuting both federal and state crimes in New Hampshire, including homicide, voter fraud, drug offenses, firearm violations, and financial fraud.
Raphael Katz was named Chief of the Civil Division after serving as Acting Chief beginning May 2025. Katz also coordinates Affirmative Civil Enforcement efforts and has resolved cases involving healthcare fraud, customs fraud, financial fraud, drug diversion, and civil rights enforcement—resulting in significant recoveries for the government.
Ryan Martin is now Administrative Officer for the district after being appointed in January 2026. Martin supervises budgetary matters along with facilities management, procurement processes, human resources functions, IT support services, and records management within the office. He joined the Department of Justice in 2022 following a 23-year law enforcement career that included service as Captain at 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.”
