He assists clients in the automotive, chemical, defense, energy, manufacturing, and real estate sectors with environmental risks and liabilities arising out of litigation and regulation. Prior to joining Jenner & Block, he was an associate at Exponent, Inc., a scientific and technical consulting firm, where he assisted testifying expert witnesses in a variety of disciplines, including economics, statistics, epidemiology, and toxicology. There, the matters with which he assisted included products liability and toxic torts; federal regulation of chemicals and products; insurance and reinsurance coverage disputes; and antitrust and securities fraud.