SAN FRANCISCO—Attorneys at two outside firms hired by Bio-Rad Laboratories Inc. raised concerns about the job performance of general counsel Sanford Wadler before he was fired in June 2013, Bio-Rad’s CEO Norman Schwartz testified on Monday.

Patrick Norton, a former Steptoe & Johnson partner who led the company’s internal investigation of potential Foreign Corrupt Practices Act violations, recommended that Bio-Rad fire Wadler as early as 2011 for failing to address FCPA issues until they had grown into a full-blown crisis, Schwartz said.