The SST Chicago window offices facing Lake Michigan.
John-Michael Porretta

John-Michael Porretta


(312) 767-9790


John-Michael Porretta is a partner with Sinars Slowikowski Tomaska and has more than a decade of civil litigation experience. He is a member of the SST Executive Committee and serves as the committee chair for associate professional development. 

John-Michael concentrates his practice on product liability, toxic torts, and occupational injury claims, including the defense of asbestos litigation. He has lengthy experience in asbestos personal injury, toxic tort and product liability cases. John-Michael has a wealth of deposition experience and routinely argues on behalf of his clients throughout Illinois and Missouri. He is also responsible for all aspects of case management, including motion practice, discovery disputes, settlement negotiations and trial preparation.

John-Michael also serves as general counsel for a local apparel company. In this role he has examined and drafted numerous internal policies, examined and drafted numerous contracts with suppliers and customers, and assisted in the purchase and sale of businesses and commercial real estate.

​In law school, John-Michael was Business Editor of the Journal of Sports Law and Contemporary Problems.

Outside the office, John-Michael enjoys maximizing travel points, watching multiple games at the same time, and trying to become the king of Race Judicata.

Publications and Presentations

"Litigating Sports Brain Injuries: The New Ball Game." Co-author. Illinois Bar Journal 104, no. 6 (2016)