B. Stephanie Siegmann

Leveraging her extensive and vast trial experience as a former Navy JAG and national security prosecutor, B. Stephanie Siegmann specializes in handling civil and criminal inquiries and enforcement proceedings as well as internal investigations. Stephanie chairs Hinckley Allen’s International Trade & Global Security practice. 

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 offers extensive experience and insider perspectives on the application of national security laws, white collar defense, trial tactics and strategies, 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 export controls (ITAR and EAR), sanctions, national security, cybersecurity and data protection, grant compliance, money laundering, theft of trade secrets and intellectual property, and financial crimes. She conducts internal investigations, provides assistance with obtaining export licenses and compliance policies, 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.

In her capacity as National Security Chief, she was responsible for supervising all national security investigations/prosecutions in Massachusetts, including cyber intrusions, international and domestic terrorism, terrorist financing, violations of US export control laws and sanctions regulations, espionage, trade secret theft, foreign influence operations, money laundering, and fraud.  Stephanie has earned numerous awards during her career for her military service and her work in national security and white collar defense. 

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