Erin M. Dunston

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...

For almost 20 years, Daniel J. Mann has represented individuals and families who have been victims of defective manufactured products, trucking and motor vehicle accidents , construction and workplace accidents, premises defects, and medical malpractice. He has brought cases against obstetricians and hospitals for birth injury and malpractice, trucking companies for accidents resulting in severe injury and death, and car manufacturers for unsafe vehicle construction. A partner of the firm sin...

Daniel F. Shay is a top attorney recognized by Best Lawyers in the practice area(s) of Health Care Law. Daniel F., 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 Daniel F. is held by other top lawyers in the same geographic and legal practice area.

Kayci D. Petenko is a top attorney recognized by Best Lawyers in the practice area(s) of Nonprofit / Charities Law. Kayci D., who practices law in Philadelphia, Pennsylvania, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kayci D. is held by other top lawyers in the same geographic and legal practice area.

Patrick J. O´Connor is vice chairman of Cozen O´Connor. He is a trial lawyer who focuses his practice on litigation arising out of contracts, banking matters, estates, professional liability involving legal and accounting matters, health care, and aviation-related claims. Prior to joining Cozen O´Connor in 1973, he served as law clerk to the Hon. Thomas J. Clary, chief judge of the U.S. District Court for the Eastern District of Pennsylvania, and was an associate attorney at...

Joseph E. O'Neil is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Defendants and Product Liability Litigation - Defendants. Joseph E., who practices law in Berwyn, Pennsylvania, has been recognized since 2013. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joseph E. is held by other top lawyers in the same geographic and legal practice area.

Rob is a trial attorney who concentrates his practice on complex civil litigation, ranging from commercial disputes to defending against catastrophic personal injury claims. He has counseled companies and professionals across a variety of industries, including consumer and commercial product manufacturers, construction, hospitality, insurance, and governmental transportation and maritime agencies. He is regularly called upon by sophisticated clients to handle all phases of complex litigation....

David A. Ebby is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. David A., who practices law in Philadelphia, Pennsylvania, has been recognized since 2007. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David A. is held by other top lawyers in the same geographic and legal practice area.

Matthew I. Weinstein is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Matthew I., 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 Matthew I. is held by other top lawyers in the same geographic and legal practice area.

W. John Vandenberg is a top attorney recognized by Best Lawyers in the practice area(s) of Immigration Law. W. John, who practices law in Philadelphia, Pennsylvania, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which W. John is held by other top lawyers in the same geographic and legal practice area.