Leveraging her extensive and vast trial experience as a former Navy JAG and national security prosecutor, B. Stephanie Siegmann specializes in handling high-stakes civil and criminal investigations, prosecutions, and enforcement proceedings, as well as sensitive internal investigations. Stephanie is a litigation partner, Chair of the International Trade & National Security group, and Co-Chair of the Cybersecurity, Privacy & Data Protection group.
Stephanie has been a trial lawyer for more than 25 years overseeing hundreds of complex investigations and trying countless trials. Prior to joining Hinckley Allen in March 2022, Stephanie handled and supervised some of the highest profile national security matters in the country during her 18-year tenure 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 kind, including those arising under the False Claims Act, the Securities Exchange Act, and national security laws. She offers extensive 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 and advises clients on a full range of issues involving national security, export controls (ITAR and EAR), sanctions, cybersecurity, cyber incident response, the use of artificial intelligence (AI) tools, anti-money laundering, grant compliance, theft of trade secrets and intellectual property, 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.
Prior to joining Hinckley Allen, 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 in 1997 as a prosecutor in the Navy Judge Advocate General’s Corps where she prosecuted numerous violent crimes (i.e., murder, rape, and child abuse) as well as cases involving fraud and computer offenses. While at the U.S. Attorney’s Office from September 2003 to February 2022, 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.