Stephanie Siegmann

Practice Areas

International Trade & National Security

Cybersecurity, Privacy & Data Protection

Health Care

White Collar & Government Enforcement

Securities

Research Compliance & Integrity

Litigation

Intellectual Property

Intellectual Property Litigation

Artificial Intelligence (AI)

Career

Hinckley Allen, Partner (2022-Present), Co-Chair, Artificial Intelligence, Chair, International Trade & National Security Group, Co-Chair, Cybersecurity, Privacy & Data Protection Group

United States Attorney’s Office, National Security Unit

Chief (2018-2022), Assistant U.S. Attorney (2003-2018)

Boston College Law School, Part-time Faculty Member, MLS in Cybersecurity, Risk, and Governance Program

Suffolk University Law School, Adjunct Faculty Member (2011-2013)

Edwards & Angell, LLP, Litigation Associate – Intellectual Property and Business Disputes (2003)

Hill & Barlow, Litigation Associate (2001-2003)

United States Navy, Judge Advocate General’s Corps, Trial Counsel (1997-2001)

Professional Memberships

Boston Bar Association, White Collar Crime Section Steering Committee (2021-2022, 2023-Present), International Law Section Steering Committee (2022-2023), Government Lawyer’s Forum Advisory Committee (2020-2022)

Law360, Massachusetts Editorial Review Board (2023-2024)

Massachusetts Woman’s Bar Association, Women in the Courtroom Committee (2021-Present)

National Defense Industrial Association, New England Chapter, Vice President (2022-2024), Board Member (2022, 2025-Present), Government Liaison (2021-2022)

Work Highlights

White-Collar Defense and Civil Litigation Experience:

Successfully represented a public company headquartered in the United States in an export control investigation conducted by the U.S. Department of Commerce, Office of Export Controls. The investigation was closed with the government taking no action against the company.

Represented a global life sciences company in conducting an internal investigation of the theft of trade secrets and succeeded in negotiating a favorable settlement from a former employee prior to filing a lawsuit.

Represented a cooperating healthcare company in state attorney general investigation for Medicaid and Medicare fraud, False Claims Act violations, and money laundering offenses resulting in charges against one of its vendors.

Represented an individual in a DOJ prosecution for insider trading and secured a sentence of no jail time.

Defended a medical professional investigated for violations of Controlled Substances Act and secured favorable resolution of matter with U.S. Attorney’s Office for the District of Massachusetts.

Represented a laboratory technician being investigated for research misconduct and falsifying data related to two NIH research grants. Secured a favorable voluntary settlement with NIH in which respondent was not required to make any admissions nor was he barred from conducting research in the future.

Led the internal investigation of a former employee of a global technology company for embezzlement, wire fraud, and drug offenses uncovered as a result of ransomware attack resulting in successful DOJ prosecution and recovery of losses.

Represented an attorney victim of real estate wire fraud scheme in successfully mediating and resolving matter.

Currently representing a healthcare company in an investigation of Medicaid fraud and State False Claims Act violations.

Currently representing an individual charged in a DOJ national security investigation with allegedly making false statements to law enforcement and engaging in a scheme to conceal material information.

Currently representing an individual in multi-pronged investigations regarding alleged antitrust and False Claims Act violations.

Defend individuals being investigated for research misconduct by research institutions and federal agencies, including the National Institutes of Health (NIH).

Cyber, AI, and International Trade Regulatory Compliance:

Led cyber incident response and data breach investigations for numerous companies of all sizes and types, from manufacturers, technology companies, and financial institutions to accounting and legal services businesses in connection with network intrusions, ransomware attacks, email and text message compromise scams resulting in wire fraud, and theft of sensitive data.

Performed export control classification and licensing requirement analyses for all types of organizations ranging from start-ups to large, public companies involving numerous items including hardware, software platforms, and technology that incorporate encryption as well as AI-related systems.

Assist companies of all sizes from a global energy services company to healthcare provider in the deployment of AI tools and implementation of AI governance policies, including AI-acceptable use policies, and conduct risk assessments of AI tools and systems.

Provide strategic advice and legal assistance on U.S. import laws and regulations as well as tariffs to companies seeking to import goods from overseas.

Assist companies and educational institutions regarding compliance issues stemming from expansion of immigration enforcement actions under the new Trump administration as well as national security issues.

Conducted sanctions review and due diligence analysis for a financial institution to ensure compliance with U.S. laws and regulations.

Conducted internal investigation of U.S. based manufacturer’s compliance with, among other things, cybersecurity requirements imposed under the FAR and DFARS and export control laws.

Advise and assist organizations on cybersecurity, government contractual requirements, safeguarding electronic protected health information, HIPAA issues, data privacy, export control laws and sanctions, the Foreign Agents Registration Act (FARA) and national security laws such as the regulations pertaining to the Committee on Foreign Investment in the United States (CFIUS), online threats, protection of intellectual property and proprietary information, insider threats, fraud, and general compliance matters.

Expert in these Jurisdictions

District of Columbia

Massachusetts

United States Court of Appeals for the Federal Circuit

United States Court of Appeals for the First Circuit

United States District Court for the District of Massachusetts

United States Court of Federal Claims

Experience

Leveraging her extensive and vast trial experience as a former Navy JAG and national security prosecutor, B. Stephanie Siegmann specializes in handling high-stakes criminal and civil litigation matters, sensitive internal investigations, government enforcement proceedings, and cyber-related incidents of all kinds.

Stephanie has been a trial lawyer for more than 25 years overseeing hundreds of complex investigations and trying dozens of federal trials. Prior to joining Hinckley Allen, Stephanie handled and supervised some of the highest-profile national security matters in the country as a former prosecutor and National Security Chief in the United States Attorney’s Office for the District of Massachusetts. Stephanie understands the current threat landscape facing businesses and is uniquely positioned to assist organizations in preparing for, investigating, and mitigating risks of all kinds, including those arising under the False Claims Act, the Securities Exchange Act, and data privacy and national security laws. She offers strategic advice, extensive legal experience, and insider perspectives on the application of national security and federal criminal laws, white-collar defense, trial tactics and strategies, cyber threats, crisis management, and government enforcement.

Stephanie uses her experience as a former prosecutor to defend companies and individuals in complex government investigations. She advises clients on a full range of issues involving national security, export controls (ITAR and EAR), sanctions, cybersecurity, cyber incident response, data privacy, the use of artificial intelligence (AI) tools and systems, anti-money laundering, grant compliance, theft of trade secrets and intellectual property, and healthcare and financial crimes. She conducts internal investigations, provides guidance on developing robust regulatory compliance programs, interfaces with law enforcement agencies, responds to government inquiries and subpoenas, seeks to favorably resolve government enforcement matters, and provides aggressive representation in civil and criminal matters. Her practice also includes conducting risk assessments of AI systems, assisting clients with implementing AI Governance policies and practices, compliance with new AI-related laws and regulations, and advising clients on evolving legal and strategic issues related to AI and emerging technologies.

Stephanie served as the National Security Chief of the United States Attorney’s Office for the District of Massachusetts and in that role, learned how to thwart insider threats and respond to emergencies of all kinds. She was responsible for supervising all national security investigations and prosecutions in Massachusetts, including national security cyber intrusions, international and domestic terrorism, terrorist financing, violations of U.S. export control laws and sanctions regulations, theft of intellectual property and proprietary information, online threats, money laundering, espionage, and fraud. She also oversaw investigations involving foreign influence operations and attempts by China and other countries to steal U.S. technology and intellectual property from businesses and academia using cyber-enabled means and insiders.

Stephanie began her career as a prosecutor in the Navy Judge Advocate General’s Corps where she prosecuted numerous violent crimes and cases involving fraud and computer offenses. While at the U.S. Attorney’s Office, Stephanie handled several high profile matters as a national security prosecutor including: the extradition and successful prosecution of a Chinese businessman for illegally supplying hundreds of U.S. manufactured pressure transducers (a critical component in developing weapons’ grade uranium) to Iran’s nuclear weapons program using front companies located in China and conspirators located in several countries; obtaining a guilty plea from a Chinese businessman for illegally supplying parts with applications in anti-submarine warfare to a prohibited end-user on the Department of Commerce’s Entity List; a plot directed by a prolific ISIS recruiter located in Syria to behead people in the United States, resulting in a 30-year sentence against the leader of the conspiracy after trial; and the successful prosecution of three friends of Dzhokhar Tsarnaev for the obstruction of the Boston Marathon bombings investigation.

Additionally, working with the Deputy Chief of Export Control and Sanctions at the Department of Justice, Stephanie conducted a three-year investigation of SAP SE, a global software company headquartered in Germany, after they made a voluntary self-disclosure that their software had been illegally downloaded in Iran, resulting in a non-prosecution agreement due to the company’s self-disclosures, level of cooperation, and extensive remediation efforts.

Education

Awards