Amanda Bossert

Tom represents clients in white collar criminal matters, corporate investigations and complex civil litigation. Tom’s national practice is focused on representing entities facing government investigations. particularly focused in the health care industry. He also represents businesses and individuals facing investigation by federal and state law enforcement authorities, government regulatory agencies and congressional committees. For example, he has represented major pharmaceutical comp...

William H. Catto is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Construction and Litigation - Labor and Employment. William H., who practices law in Philadelphia, Pennsylvania, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William H. is held by other top lawyers in the same geographic and legal practice area.

Joseph L. Messa, Jr. is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Plaintiffs and Product Liability Litigation - Plaintiffs. Joseph L., who practices law in Philadelphia, Pennsylvania, has been recognized since 2016. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joseph L. is held by other top lawyers in the same geographic and legal practice area.

As a civil trial lawyer for the last twenty-five years, Steve Bardsley has developed extensive experience in multiple practice areas, with recognized skill in professional liability, environmental law, and construction law. Whether handling cases before state and federal courts or in arbitration forums, Steve’s primary focus is always on solving client problems in the most efficient and ethical manner. Steve has a proven track record of skillfully handling a wide range of construction m...

Nils B. Snell is a top attorney recognized by Best Lawyers in the practice area(s) of Product Liability Litigation - Defendants. Nils B., who practices law in Philadelphia, Pennsylvania, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Nils B. is held by other top lawyers in the same geographic and legal practice area.

After nearly thirty (30) years of distinguished full-time practice in the area of Construction Law, Margaret Underwood is now Of Counsel to Horn Williamson. During her full-time practice of law, Ms. Underwood provided high-level legal services to local, national, and international owners, contractors, and subcontractors on many of the largest and most prestigious construction projects located in and around the Philadelphia Area and as far away as Europe and the Marshall Islands. Her extensive...

Whether in the courtroom or the community, Stewart L. Cohen has worked relentlessly as an advocate on behalf of his clients for over thirty years. Mr. Cohen has achieved seven-figure and higher recoveries for scores of his clients over the course of his career. Mr. Cohen is a shareholder in the firm, focusing his practice on complex civil litigation, including medical malpractice, workplace accidents and class actions. His skill as a trial lawyer has resulted in a long record of successes inc...

Peter Amuso's legal journey was inspired by his grandfather, whose legacy deeply influenced his career choices. Pursuing higher education with an Army ROTC Scholarship, Peter graduated magna cum laude from Georgetown University in 1994. He then attended Harvard Law School, earning his degree with honors in 1997, before serving overseas as an active duty Army officer in the Judge Advocate General's Corps. During his time in the JAG Corps, Peter notably worked on a defense team that successfull...

Timothy D. Rau is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Defendants. Timothy D., who practices law in Philadelphia, Pennsylvania, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Timothy D. is held by other top lawyers in the same geographic and legal practice area.

A graduate of the University of Pennsylvania and its law school, Marc Jonas is co-chair of the firm's Land Use and Zoning practice group. He has extensive experience in real estate, land use, municipal law, and zoning matters, representing individuals, businesses, institutions, non-profit organizations and municipalities. Marc has practiced land use and real estate law for more than 30 years. In his career, Marc has appeared as counsel in Pennsylvania state and federal courts in matters invol...