Jeff Cooper is no longer a partner at the firm he helped build, according to the SimmonsCooper website.
Cooper is now listed in the "of counsel" section of the staff at the firm.
His biography states that he is the former managing partner at firm.
Calls and emails to Cooper have not been returned as of press time.
Cooper is currently lobbying to get a Major League Soccer franchise to Collinsville.
John Simmons started the firm, then knows as The Simmons Firm, in 1999 with eight employees focusing on asbestos litigation.
The firm now has 60 attorneys and more than 350 employees. It has expanded into many others fields of law including benzene, securities litigation, business and personal litigation and intellectual property.
In addition to its East Alton office, SimmonsCooper also has shops in Chicago and El Segundo, Calif.