Arnold & Porter Welcomes DOJ National Security Leader Eun Young Choi as Partner.
Arnold & Porter has expanded its White Collar Defense & Investigations and National Security practices with the addition of Eun Young Choi, a respected former federal prosecutor and senior official at the U.S. Department of Justice (DOJ).
Ms. Choi joins the firm as a partner in the New York office, bringing more than a decade of government experience in cybercrime, digital assets, and national security enforcement.
Known for her leadership in some of the DOJ’s most high-profile and complex cyber investigations, Eun Young Choi most recently served as Deputy Assistant Attorney General for National Asset Protection in the DOJ’s National Security Division (NSD).
She was the DOJ’s point person on state-sponsored cyber threats, foreign investment risks, and digital surveillance issues, making her one of the country’s foremost experts at the intersection of law, technology, and national defense.
At the DOJ, Choi oversaw more than 120 attorneys and staff, established the National Security Cyber Section, and served as the department’s representative on National Security Council interagency committees focused on cyber and intelligence matters.
Ms. Choi also led the Foreign Investment Review Section, directing the DOJ’s participation in CFIUS and advancing initiatives to safeguard sensitive U.S. data from foreign threats.
In 2021, she was appointed Director of the National Cryptocurrency Enforcement Team (NCET), where she led investigations into the criminal misuse of blockchain technologies and virtual currencies.
Her team pursued cases involving ransomware-linked crypto exchanges, illicit finance networks, and nation-state cyber activity.
Earlier, Ms. Choi spent nearly a decade as an Assistant U.S. Attorney in the Southern District of New York (SDNY), prosecuting major cases involving cyber intrusions, digital asset crimes, and transnational fraud.
“Eun Young is a seasoned litigator with an impressive mastery of cybercrime and cryptocurrency and a deep understanding of various white collar and national security matters, gained from her experience as a former senior member of the DOJ and her long tenure as an AUSA with the Southern District of New York.” said Marcus Asner, co-chair of Arnold & Porter’s White Collar Defense & Investigations practice.
“She is well-positioned to advise clients on emerging key areas such as cyber, cryptocurrency, and artificial intelligence, along with internal and government investigations and other complex and sensitive matters.”
In a statement, Choi said she was “thrilled” to join Arnold & Porter and bring her public service experience to bear in helping clients tackle urgent legal challenges.
“I am thrilled to join Arnold & Porter. I look forward to drawing upon my Department of Justice experience from my frontline work as a prosecutor in the Southern District of New York to my leadership shaping national security and emerging technology strategy at Main Justice to enhance the firm’s capabilities in investigations and litigation.”
“Together with my new colleagues, I hope to guide clients through their most pressing challenges, particularly in cybersecurity, digital assets, artificial intelligence, and emerging technologies.”
“I am committed to providing the strategic counsel clients need to navigate government enforcement, complex investigations, and critical national security risks related to foreign investment and data.”
Education and Legal Credentials
Ms. Choi earned her J.D. from Harvard Law School, cum laude, and received her A.B. from Harvard University, magna cum laude. She began her legal career with clerkships for Judge Reena Raggi of the U.S. Court of Appeals for the Second Circuit and Judge Naomi Reice Buchwald of the U.S. District Court for the Southern District of New York.
She joins a strong roster of SDNY alumni at Arnold & Porter, including Marcus Asner, Stephen Cha-Kim, William Hoffman, Michael Kim Krouse, Manvin Mayell, Nancy Milburn, Michael Rogoff, Craig Stewart, and Baruch Weiss.
Arnold & Porter is a leading international law firm with over 1,000 lawyers across 15 offices worldwide. The firm offers comprehensive regulatory, litigation, and transactional services across more than 40 practice areas, serving clients in industries such as life sciences, financial services, technology, and government. Known for its deep industry experience and integrated approach, Arnold & Porter provides innovative solutions to complex legal challenges, drawing on insights from both government and private sector perspectives. The firm’s commitment to excellence, diversity, and public service has earned it recognition in various legal rankings and publications.
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