Stuart H. Sostmann Named Managing Attorney of Marshall Dennehey’s Pittsburgh Office

Stuart H. Sostmann, shareholder and co-chair of Marshall Dennehey’s Construction Injury Litigation Practice Group, has been named Managing Attorney of the the firm’s Pittsburgh office. He inherits the position from Scott G. Dunlop who served in the role for almost 30 years and will retire at the end of the year. Sostmann has served as Assistant Managing Attorney of the Pittsburgh office since 2023.

Marshall Dennehey’s Pittsburgh office is the firm’s third largest, following Philadelphia and Mount Laurel, NJ. The office houses 39 attorneys who practice in the areas of casualty, professional liability, health care and workers’ compensation litigation. In addition to providing counsel in Western Pennsylvania, a number of the office’s attorneys are barred in West Virginia and represent clients in its state and federal district courts. 

“Stu is a true leader who is committed to his work, his colleagues and to the firm’s culture and success,” said G. Mark Thompson, Marshall Dennehey’s President & CEO. “An outstanding trial lawyer, he serves as the Casualty Supervisor of the office, is a member of our Diversity, Equity & Inclusion Committee, and is a former president of the Pennsylvania Defense Institute. For the past year, he has worked closely with Scott, and we are fully confident he will maintain Scott’s high standards taking the office into the future.” 

Sostmann joined the firm in 1998. With over two decades of experience as a litigator, he has successfully tried numerous  cases to verdict in both state and federal courts. From routine matters to high-exposure cases, he concentrates his practice in construction litigation, product liability, premises liability, auto liability, marine liability, dram shop and commercial litigation. As the Casualty Litigation Supervisor, he ensures the office’s casualty cases are handled promptly, professionally and effectively.
 
In addition to the Pennsylvania Defense Institute (PDI), Sostmann is a member of the Allegheny County Bar Association and the Academy of Trial Lawyers of Allegheny County. He is a graduate of the University of Pittsburgh and the University of Pittsburgh School of Law.