Sean Chang focuses his practice on government and internal investigations and regulatory enforcement matters. He has helped clients navigate investigations by the Securities and Exchange Commission (SEC), the Federal Trade Commission (FTC), and the Consumer Financial Protection Bureau (CFPB), among other regulators. He also has experience conducting racial equity reviews and civil rights assessments on behalf of major corporations. Mr. Chang maintains an active pro bono practice, with a focus on reproductive rights. 

Prior to joining the firm, he was a law clerk for Senator Amy Klobuchar on the US Senate Judiciary Committee and worked as a legal assistant for a national litigation law firm in New York City. 

Prior to attending law school, Mr. Chang interned with Immigration Equality in New York City, an organization advocating for LGBTQ and HIV-positive immigrant rights, and High Jump in Chicago, Illinois, an organization working to equalize access to education for middle school students who have exhibited academic ambition and potential and who are of limited economic means. He also worked as a casework intern in the office of US Senator Richard Durbin in Chicago, Illinois.