Mark Mazzanti is a founding partner of Del Collo &Mazzanti LLP and has emphasized workers’ compensation defense litigation in behalf of insurers and large employers in over 40 years of practice.

Mr. Mazzanti’s introduction to Pennsylvania Workers’ Compensation law was his judicial clerkship with the late Theodore O. Rogers of the Commonwealth Court. He then learned the claimant’s perspective as an associate at a well- known claimant’s firm, before moving on to staff and senior trial counsel positions with major insurers, defending civil actions, as wel as workers’ compensation claims.

In the course of his career, Mr. Mazzanti has handled literally thousands of workers’ compensation hearings, mediations and expert witness depositions, as well as scores of oral arguments before the Workers’ Compensation Appeal Board and the Commonwealth Court. He has presented before the Pennsylvania Bureau of Workers’ Compensation Conference, the Pennsylvania Bar Institute, the Delaware County Bar Association, the Philadelphia Bar Association, the Philadelphia Society for Healthcare Risk Management, and PESI.

Under Mr. Mazzanti’s tutelage, three of his former associates are now sitting workers’ compensation judges. Every attorney at Del Collo & Mazzanti shares M.r Mazzanti’s focus on excellence in client service.

In 2013, Mr. Mazzanti was certified as a Specialist in the practice ofworkers’ compensation law by the Pennsylvania Bar Association’s Section on Workers’ Compensation Law as authorized by the Pennsylvania Supreme Court. In 2017 Mr. Mazzanti served as the Defense Chair of the Philadelphia Bar Association’s Workers’ Compensation Section. From 2018 to present, he has served as a member of the Board of Governors of the Philadelphia Bar Association.



Certification: Certified as a specialist in the practice of workers’ compensation law by the Pennsylvania Bar Association’s Section on Workers’ Compensation Law as authorized by the Pennsylvania Supreme Court, 2013
Practice Areas: Workers’ Compensation; Automobile Liability; Premises Liability, Subrogation
Admitted: 1979, Pennsylvania and U.S. District Court, Eastern District of Pennsylvania
Law School: Widener University, J.D.
Member: Pennsylvania Bar Association/Workers’ Compensation Section, Philadelphia Bar Association/Board of Governors and Workers’ Compensation Section, Delaware County Bar Association/ Workers’ Compensation Section.
Peer rating: A/V Pre-Eminent (Martindale-Hubbell)
Biography: Law Clerk, Honorable Theodore O. Rogers, Commonwealth
Court of Pennsylvania, 1979-1980. Associate: Freedman &Lorry, 1980-1981. Staff Counsel, Home Insurance Co., 1982-1985. Senior Trial Attorney, General Accident Ins. Co,. 1985-1987. Law Offices of Mark .L Mazzanti, 1987-1989.
Born: December 25, 1954, Bryn Mawr, PA

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