Portrait of Paul J. (PJ) Cosgrove

Paul J. (PJ) Cosgrove

Partner | Co-Group Leader, Product Liability

P.J. represents medical device and pharmaceutical manufacturers in pattern litigation or mass torts, particularly multidistrict litigation (MDL), and in “one-off” product liability suits. He serves as national coordinating and trial counsel in large, complex matters and individual cases. He has defended toxic and environmental exposure suits, and he also defends individuals and companies in alleged class actions and complex business litigation, particularly involving claims of fiduciary breaches, consumer fraud, deceptive practices, and professional negligence.

P.J. has been a key member of trial teams in high-profile litigation and actively manages all stages of pretrial proceedings. He has significant experience defending and examining corporate and expert witnesses in various fields, including industry-specific standards of care, regulatory affairs, medical causation, surgical techniques, materials science, toxicology, internal medicine, and economic losses. This experience extends beyond the deposition stage, where he designs and implements strategies to exclude (or limit) expert testimony through motions practice or evidentiary hearings pursuant to Daubert, Kemp, Havner/Robinson, and similar admissibility standards.

P.J. has briefed and argued dispositive motions and appeals in state and federal trial and appellate courts nationwide. In addition, he has conducted arbitrations and mediations dealing with a host of disputes.

In addition to serving as Co-Group Leader of the firm’s Product Liability Practice Group, P.J. is active in local and state bar associations and frequently presents on product liability issues, covering issues such as the Biomaterials Access Assurance Act, preemption, supply chain liability, personal jurisdiction, case management and dispositive motion strategies, including with respect to punitive damages claims, and other matters pertinent to defense of medical device and pharmaceutical manufacturing firms. He is a frequent speaker at the American Conference Institute’s Annual Conference on Drug & Medical Device Litigation.

Clients appreciate his dedication to the issues they face. To further his understanding of the industry, P.J. has been a member of the Regulatory Affairs Professional Society since 2011 and he is active in BioOhio, a nonprofit intended to build and accelerate the bioscience industry. P.J. was selected by his peers for inclusion in The Best Lawyers in America®in the Product Liability Litigation field, has been recognized as a “Litigation Star” by Benchmark Litigation, and has been named to the Ohio Super Lawyers list.

    Education

    • The Ohio State University (B.A.)
    • Rutgers Law School (J.D.)
    • Temple University Beasley School of Law (LL.M.)
      • Trial Advocacy

    Bar Admissions

    • New Jersey
    • Pennsylvania
    • Ohio
    • U.S. Supreme Court
    • U.S. Court of Appeals, First Circuit
    • U.S. Court of Appeals, Third Circuit
    • U.S. Court of Appeals, Sixth Circuit
    • U.S. District Court, New Jersey
    • U.S. District Court, Eastern District of Pennsylvania
    • U.S. District Court, Northern District of Ohio
    • U.S. District Court, Southern District of Ohio
    • U.S. District Court, Central District of Illinois
    • U.S. District Court, Northern District of Illinois

    Professional Affiliations

    • American Bar Association
    • Ohio State Bar Association
    • New Jersey Bar Association
    • Defense Research Institute
    • International Association of Defense Counsel
    • Ohio Association of Civil Trial Attorneys
    • The Sedona Conference – Working Group on Mass Tort Punitive Damages
    • Counsel on Litigation Management (Member)
    • Regulatory Affairs Professional Society (Member)

    Firm Involvement

    • Co-Group Leader, Product Liability

    Awards & Honors

    • Named to Top Lawyers, Product Liability by Cincinnati Magazine (2026) 
    • Named to The Best Lawyers in America®Mass Tort Litigation / Class Actions – Defendants; Product Liability Litigation – Defendants (2015-2026), Commercial Litigation (2024-2026)
    • Named a "Litigation Star" in Ohio by Benchmark Litigation (2024-2026)
    • Named a “Future Star” in Ohio by Benchmark Litigation (2019-2023)
    • Named to the Ohio Super Lawyers list (2017-2026)
    • Ranked a Top 50 Cincinnati attorney in the Ohio Super Lawyers list (2024-2026)
    • Recognized as one of the Top 100 lawyers in the state of Ohio by Super Lawyers (2025)
    • Defense Attorney of the Year, Medmarc Insurance Group (2015)
    • Named to the Ohio Super Lawyers Rising Stars list (2007; 2009-2013)
    • Cincinnati Academy of Leadership for Lawyers, CALL Class XIV (2009-2010)
    • Best Oralist – First Preliminary Round, 1999 National Environmental Law Moot Court Competition

    Certifications

    • Certified by the State of New Jersey Judiciary as a Small Claims Mediator

Paul J. (PJ) Cosgrove

P.J. represents medical device and pharmaceutical manufacturers in pattern litigation or mass torts, particularly multidistrict litigation (MDL), and in “one-off” product liability suits. He serves as national coordinating and trial counsel in large, complex matters and individual cases. He has defended toxic and environmental exposure suits, and he also defends individuals and companies in alleged class actions and complex business litigation, particularly involving claims of fiduciary breaches, consumer fraud, deceptive practices, and professional negligence.

P.J. has been a key member of trial teams in high-profile litigation and actively manages all stages of pretrial proceedings. He has significant experience defending and examining corporate and expert witnesses in various fields, including industry-specific standards of care, regulatory affairs, medical causation, surgical techniques, materials science, toxicology, internal medicine, and economic losses. This experience extends beyond the deposition stage, where he designs and implements strategies to exclude (or limit) expert testimony through motions practice or evidentiary hearings pursuant to Daubert, Kemp, Havner/Robinson, and similar admissibility standards.

P.J. has briefed and argued dispositive motions and appeals in state and federal trial and appellate courts nationwide. In addition, he has conducted arbitrations and mediations dealing with a host of disputes.

In addition to serving as Co-Group Leader of the firm’s Product Liability Practice Group, P.J. is active in local and state bar associations and frequently presents on product liability issues, covering issues such as the Biomaterials Access Assurance Act, preemption, supply chain liability, personal jurisdiction, case management and dispositive motion strategies, including with respect to punitive damages claims, and other matters pertinent to defense of medical device and pharmaceutical manufacturing firms. He is a frequent speaker at the American Conference Institute’s Annual Conference on Drug & Medical Device Litigation.

Clients appreciate his dedication to the issues they face. To further his understanding of the industry, P.J. has been a member of the Regulatory Affairs Professional Society since 2011 and he is active in BioOhio, a nonprofit intended to build and accelerate the bioscience industry. P.J. was selected by his peers for inclusion in The Best Lawyers in America®in the Product Liability Litigation field, has been recognized as a “Litigation Star” by Benchmark Litigation, and has been named to the Ohio Super Lawyers list.

Paul J. (PJ) Cosgrove


Paul J. (PJ) Cosgrove

P.J. represents medical device and pharmaceutical manufacturers in pattern litigation or mass torts, particularly multidistrict litigation (MDL), and in “one-off” product liability suits. He serves as national coordinating and trial counsel in large, complex matters and individual cases. He has defended toxic and environmental exposure suits, and he also defends individuals and companies in alleged class actions and complex business litigation, particularly involving claims of fiduciary breaches, consumer fraud, deceptive practices, and professional negligence.

P.J. has been a key member of trial teams in high-profile litigation and actively manages all stages of pretrial proceedings. He has significant experience defending and examining corporate and expert witnesses in various fields, including industry-specific standards of care, regulatory affairs, medical causation, surgical techniques, materials science, toxicology, internal medicine, and economic losses. This experience extends beyond the deposition stage, where he designs and implements strategies to exclude (or limit) expert testimony through motions practice or evidentiary hearings pursuant to Daubert, Kemp, Havner/Robinson, and similar admissibility standards.

P.J. has briefed and argued dispositive motions and appeals in state and federal trial and appellate courts nationwide. In addition, he has conducted arbitrations and mediations dealing with a host of disputes.

In addition to serving as Co-Group Leader of the firm’s Product Liability Practice Group, P.J. is active in local and state bar associations and frequently presents on product liability issues, covering issues such as the Biomaterials Access Assurance Act, preemption, supply chain liability, personal jurisdiction, case management and dispositive motion strategies, including with respect to punitive damages claims, and other matters pertinent to defense of medical device and pharmaceutical manufacturing firms. He is a frequent speaker at the American Conference Institute’s Annual Conference on Drug & Medical Device Litigation.

Clients appreciate his dedication to the issues they face. To further his understanding of the industry, P.J. has been a member of the Regulatory Affairs Professional Society since 2011 and he is active in BioOhio, a nonprofit intended to build and accelerate the bioscience industry. P.J. was selected by his peers for inclusion in The Best Lawyers in America®in the Product Liability Litigation field, has been recognized as a “Litigation Star” by Benchmark Litigation, and has been named to the Ohio Super Lawyers list.