Lara Shalov Mehraban, who was the U.S. Securities and Exchange Commission’s New York regional office acting director, has left to join Sidley Austin as a partner in its securities enforcement practice.

The move, announced Wednesday, is the latest in a string of SEC exits over the last year, driven by what experts say is an insatiable demand for SEC-related legal services in big firms as well as some discontent with new SEC chair Gary Gensler. Sources have told Law.com that Gensler’s goals have translated into more work—and sometimes disagreements—with staff attorneys over the direction of the agency.