Tina Diamantopoulos

Tina currently serves as an Associate Regional Director for the U.S. Securities and Exchange Commission’s Division of Examinations in the Chicago Regional Office. She has held this position since April 2022. In this role, she oversees and manages teams that examine broker-dealers, transfer agents, municipal advisors, security-based swap dealers, funding portals and exchanges. Prior to this appointment, Tina served as the Counsel to the Regional Director from September 2010 and was responsible for advising on legal, policy and operational issues, as well as leading, managing and coordinating national priority matters and cross-divisional initiatives. She also proactively enhanced coordination between the Enforcement and Exams staff and cultivated critical partnerships with regulators and law enforcement. From October 2004 until September 2010, Tina served as a Senior Special Counsel of Examinations and was responsible for advising the Broker-Dealer Examinations Program, representing the Commission in dealings with the securities industry, state and federal officials and the public, and handling Enforcement referrals.
Previous to that appointment, Tina served for over ten years in the Commission’s Division of Enforcement. For five of those years, she served as a Branch Chief, supervising a group of attorneys. During her tenure in the Enforcement Division, she investigated, litigated and supervised several distinguished cases involving violations of the federal securities laws, such as financial and offering fraud, sales practice abuses, failure to supervise, insider trading, market manipulation, disclosure issues and pay-to-play. Throughout her tenure, Tina has worked with several US Attorney’s Offices across the country. She was deputized as a Special Assistant United States Attorney in the District of Minnesota and was co-counsel in a multi-million dollar criminal jury trial involving securities, mail and wire fraud, and money laundering.
Tina is a member of the Trial Bar for the U.S. District Court for the Northern District of Illinois. Tina graduated from Northwestern Pritzker School of Law. Prior to law school, she graduated cum laude from Marquette University with a Bachelor of Arts degree in Political Science and a Spanish minor.