Former HSI Supervisory Special Agent and Section Chief | Builder and leader of HSI’s Government Supply Chain Investigations Unit | Former Assistant Attaché, Frankfurt, Germany | Undercover counterproliferation investigator
Brian Andersen is a retired Homeland Security Investigations Supervisory Special Agent and national security investigations leader with more than 20 years of federal experience across counterproliferation, export controls, sanctions, financial crime, human rights, war crimes, and government supply chain security.
As an architect and leader within HSI’s Government Supply Chain Investigations Unit, Brian focused on building the teams, tools, and investigative frameworks needed to identify and disrupt counterfeit, substandard, non-compliant, and fraudulently sourced goods entering U.S. government supply chains. That work directly impacted military readiness, warfighter safety, first responder protection, federal procurement integrity, and the security of critical government systems.
Brian also served as Assistant Attaché at the U.S. Consulate General in Frankfurt, Germany, coordinating cross-border investigations across Northern and Central Europe involving counterproliferation, sanctions evasion, financial crime, pharmaceutical diversion, visa security, and transnational criminal networks. Earlier, as a Senior Special Agent and undercover operative in HSI Boston’s Counterproliferation Investigations program, he developed covert commercial platforms to identify illicit procurement networks seeking controlled U.S. technology for sanctioned, restricted, and high-risk end users.
Across his career, Brian worked with HSI, CBP, BIS, DOJ, DCSA, and other federal and international partners across counterproliferation, trade enforcement, supply chain security, procurement integrity, and national security investigations.
At Tesari AI, Brian leads National Security Applications, translating decades of investigative experience into product, workflow, and customer-facing applications of the platform. His role connects product, engineering, growth, and customer engagement, helping ensure Tesari reflects how high-stakes investigations and compliance decisions actually develop. He helps shape use cases across export controls, sanctions, government supply chain security, procurement integrity, and cross-border risk, with a focus on moving investigators and compliance teams from fragmented information to defensible decisions before the operational clock runs out.