Campos, 58, a Harlingen native and former Houston radio executive, will become partner-in-chief of the firm's Washington office.

Campos, who has served on the commission for five years, announced Aug. 9 he would return to the private sector.

Before joining the SEC, he was one of two principal owner/executives of El Dorado Communications, a Houston-based radio broadcasting company.

In his new job, Campos will represent companies in SEC enforcement matters and internal investigations, advise corporate boards about governance issues, and counsel private equity, hedge and mutual funds on regulatory matters.

"I look forward to advising companies on important issues related to SEC guidelines and corporate governance that will benefit the companies themselves, as well as continue to bolster investor confidence," Campos said in a prepared statement.