Robert Greffenius’s practice consists of representing individuals and entities in a broad range of governmental and internal investigations, including matters involving the Securities and Exchange Commission (SEC), the Department of Justice (DOJ), the Federal Reserve Board, state attorneys general, securities self-regulatory organizations and foreign regulatory agencies. His representations have included responding to multi-faceted and multi-jurisdictional regulatory investigations, special litigation committee inquiries, alleged accounting irregularities and alleged insider trading. He also advises broker-dealer clients on regulatory compliance issues such as best execution and Regulation NMS.

Prior to joining the firm, Mr. Greffenius was an associate at a prominent law firm in Washington DC, where his practice focused on securities investigations conducted by the SEC and DOJ. During his time there, he co-authored an article analyzing insider trading matters involving misappropriation of information by family and friends. He also participated in a fellowship program at The Constitution Project, where he helped research and draft a report on data privacy and government data mining.

Mr. Greffenius also served as a voluntary law clerk to the Hon. Reggie B. Walton of the US District Court for the District of Columbia.