News & Events

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 is proud to highlight the firm’s 109 attorneys who have been recognized in the 2025 editions of The Best Lawyers in America® and the Best Lawyers: Ones to Watch® in America. Less than 6% of all practicing lawyers in the U.S. were selected by their peers for this recognition.

Additionally, five of the firm’s attorneys received the Best Lawyers® 2025 “Lawyer of the Year” awards in their respective practice areas and demographic regions. 

Teresa O. Sirianni, shareholder in the Professional Liability Department in the Pittsburgh office of Marshall Dennehey, has been elected to membership of the Academy of Trial Lawyers of Allegheny County.

Marshall Dennehey was named the first place winner in the extra-large company category at the Philadelphia Business Journal’s Best Places to Work Awards, held July 25 at Rivers Casino in Philadelphia. The firm has been recognized among the Philadelphia region’s Best Places to Work every year since 2013 and this is the firm’s fourth time winning their company-size category.

For the 12th year in a row, Marshall Dennehey has been selected one of the Philadelphia region's "Best Places to Work" by the Philadelphia Business Journal. The award recognizes the company's achievements in creating a positive work environment that attracts and retains employees through a combination of benefits, working conditions and company culture.

Marshall Dennehey announced today that Christopher S. Devlin, Esq. has joined the firm as Director of Professional Development and Training. In this capacity, he will design, implement and oversee the firm’s legal and professional skills training programs, including associate conferences, annual mock trial and summer associate program, and CLE offerings for the firm’s 500 attorneys across 19 offices. Devlin replaces former Director Lawrence J.