Donald Petrille, Jr.

Jarad L. Silverstein is a top attorney recognized by Best Lawyers in the practice area(s) of Mass Tort Litigation / Class Actions - Plaintiffs. Jarad L., 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 Jarad L. is held by other top lawyers in the same geographic and legal practice area.

Mark S. Cappuccio is Chair of the firm's Tax Assessment Appeals practice group. He is an experienced civil trial attorney and has extensive background in the areas of commercial litigation, real estate, zoning, condemnation and tax assessment law. As a member of the Firm's Zoning and Land Use Group he represents individuals, businesses and municipalities in a variety of real estate matters including land use, zoning and condemnation cases. He has been appointed to serve as a mediator in the M...

Joe concentrates in state and local taxation, regularly assisting business and individual taxpayers regarding corporate, financial institution, sales and use, income, real estate, transfer, and all other state and local taxes. A former chief counsel of the Pennsylvania Department of Revenue, he has since represented hundreds of taxpayers — including businesses, individuals, and nonprofit entities — in state and local tax planning, administrative, legislative, and litigation matter...

Paul D. Weiner is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Labor and Employment. Paul D., who practices law in Philadelphia, Pennsylvania, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Paul D. is held by other top lawyers in the same geographic and legal practice area.

Deborah R. Willig has served as Willig, Williams & Davidson’s managing partner since the firm’s founding in 1979. A determined advocate for workers, Deborah has focused her practice on labor relations and employment law since 1976. As a labor and employment attorney, Deborah has been involved in representing a wide range of labor unions including teachers, and non-professional public school employees, public health, social, and recreation workers, firefighters, teamsters and o...

David G. Mandelbaum is a shareholder in Greenberg Traurig's Litigation and Environmental Groups. http://www.gtlaw.com/People/davidmandelbaum CONCENTRATION Air, Water, and Waste Regulation Superfund and Contamination Climate Change Oil and Gas Development Water Rights SIGNIFICANT REPRESENTATIONS Representation of industrial clients in wastewater, solid waste, and air permitting matters; administrative appeals; and enforcement actions Advises clients on sustainability and climate change, risk m...

Charles J. Meyer is a shareholder in the domestic relations firm, Hofstein Weiner & Meyer, P.C. For more than 30 years, he has represented clients in all aspects of family law, including negotiations leading to prenuptial, postnuptial and co-habitation agreements, and the investigation and litigation of the financial and economic issues related to the dissolution of marriage, including child support, equitable distribution and alimony. His clients include high net worth individuals, profe...

Kristine Grady Derewicz represents employers in all aspects of labor and employment law, ranging from proactive counseling to litigation, in both union and non-union settings. She has tried numerous discrimination and Family and Medical Leave Act cases to successful resolutions, including mediated settlements and jury trials, and she has substantial knowledge of: Title VII and Title IX The Americans with Disabilities Act The Fair Labor Standards Act The National Labor Relations Act She appear...

Bryan is a partner at the firm and has experience in counseling and representing clients on a range of environmental and energy matters. Bryan’s practice has focused on regulatory compliance and transactional matters, particularly in the areas of air and water quality, redevelopment, sustainability, permitting, energy efficiency and renewable energy development. Over the last several years, Bryan has primarily worked with complex regulated industries, notably including petroleum refinin...

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...