Salvatore R. "Sal" Guerriero

Donald Gamburg is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Labor and Employment. Donald, who practices law in Philadelphia, Pennsylvania, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Donald is held by other top lawyers in the same geographic and legal practice area.

Clark Whitney is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Clark, who practices law in Philadelphia, Pennsylvania, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Clark is held by other top lawyers in the same geographic and legal practice area.

Howard is a nationally recognized real estate attorney who has been representing developers, operators, investors, and lenders in their most complex transactions for more than 30 years. He is a leading practitioner in the joint venture arena, adept at structuring sophisticated, multi-party agreements, and negotiating transactions involving diverse capital sources such as private equity, public finance, preferred equity, and senior debt. Howard also focuses his practice on guiding development ...

Matt Haverstick is a managing partner of the Firm and a partner in the Litigation Department. He represents government officials, private entities, and individuals in high-profile, media intensive litigation and appeals, ranging from major grand jury investigations to Pennsylvania Supreme Court arguments over the constitutionality of state laws. Referred to in media reports as “counsel of choice for state Republicans in a number of recent policy fights” for his work on matters tha...

Michael T. van der Veen is the founder of van der Veen, Hartshorn, and Levin in Philadelphia, Pennsylvania. His practice includes personal injury , criminal defense , commercial litigation , family law, employment law and civil rights with a long-standing commitment to representing individuals, families, and businesses in complex legal matters. Mr. van der Veen also represents plaintiffs in Personal Injury Litigation - Plaintiffs matters, advocating for people who have suffered harm due to th...

Jason M. Shargel joined the firm’s Philadelphia office in March 2009 as a member in the Business Law Department. Jason practices in the firm's Corporate Law Practice Group, and has more than 30 years of experience in the private practice of corporate and securities law. Having begun his career in the SEC's Enforcement Division, his practice includes mergers and acquisitions, as well as the representation of issuers and funds in venture capital, growth capital and other private equity fi...

Rick E. Grimaldi is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Rick E., who practices law in Philadelphia, Pennsylvania, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Rick E. 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...

Paul Bartolacci is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law and Product Liability Litigation - Plaintiffs. Paul, 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 Paul is held by other top lawyers in the same geographic and legal practice area.

Jonathan Spergel is the immediate past managing partner of Manko, Gold, Katcher & Fox LLP in Bala Cynwyd, Pennsylvania, the environmental and energy law firm with which he started his legal career in 1993. He handles a wide variety of environmental legal issues, including the environmental aspects of commercial transactions and brownfields sites, environmental insurance procurement and coverage issues, public funding opportunities, regulatory compliance counseling, and litigation for comm...