Mr Mark S. Cheffo > Dechert LLP > New York, United States > Lawyer Profile

Dechert LLP
Three Bryant Park, 1095 Avenue of the Americas
NEW YORK, NY 10036-6797
United States
Mark S. Cheffo photo

Work Department

Product Liability and Mass Torts


Mark S. Cheffo is co-chair of Dechert’s product liability and mass torts practice and has extensive experience serving as national coordinating and trial counsel in complex product liability, insurance and mass torts litigation. He acts for corporates and individuals in the pharmaceutical, medical device manufacturing, bioengineering, insurance and industrial products industries, amongst others. Mr. Cheffo has also handled numerous toxic and environmental exposure suits.

Mr. Cheffo has taken part in several trial teams in high-profile pharmaceutical litigation, managing all stages of a dispute from negotiation, through pre-trail proceedings to trial. In addition to defending expert and company witness depositions, Mr. Cheffo has briefed and conducted numerous Daubert and Frye challenges. He has also briefed and argued dispositive motions and appeals in state and federal courts throughout the United States. Mr. Cheffo also has considerable experience conducting arbitrations and mediations relating to disputes.


New York City Bar Association; International Association of Defense Counsel


Stony Brook University, B.A., with Honors, 1987, Pi Sigma Alpha National Political Science Honor Society, Phi Alpha Theta International History Honor Society; Boston University School of Law, J.D., 1990, Editor-in-Chief of American Journal of Law & Medicine, Paul J. Liacos Scholar

Lawyer Rankings

United States > Dispute resolution > Leading trial lawyers

(Leading trial lawyers)

Mark CheffoDechert LLP

United States > Dispute resolution > Product liability, mass tort and class action - defense: toxic tort

Dechert LLP represents several household names as national or co-national counsel in toxic tort matters ranging from asbestos to talcum powder litigation. The firm has defended the Saint-Gobain Performance Plastics corporation in high-profile civil litigation and regulatory matters relating to perfluorooctanoic acid, and is representing Johnson & Johnson as trial counsel in connection with talcum powder products. New-York based Sheila L. Birnbaum and Mark S. Cheffo lead the practice. Kimberly Branscome  in Los Angeles, who regularly acts as trial counsel in complex litigation, is a name to note in the toxic torts space. She joined the firm from Kirkland & Ellis LLP  together with Jay Bhimani, while William W Oxley  and Meghan Rohling Kelly departed for Baker & Hostetler LLP.

United States > Dispute resolution > Product liability, mass tort and class action - defense: pharmaceuticals and medical devices

Dechert LLP has led the defense of clients in large MDLs and state court litigation, playing a key role in high profile disputes. As national defense counsel for Purdue Pharma, the firm spearheaded the first proposed comprehensive global resolution of all state and federal cases against a defendant in opioid litigation. Nationally respected New York-based litigators Sheila L. Birnbaum and Mark S. Cheffo lead the practice. The team has undergone some changes: While William W Oxley and Meghan Rohling Kelly left for Baker & Hostetler LLP, trial team Jay Bhimani, Kimberly Branscome and counsel Benjamin Sadun joined from Kirkland & Ellis LLP.

United States > Industry focus > Healthcare: life sciences

Dechert LLP is active across all areas of the life sciences market, leveraging a strong corporate team advising on capital markets transactions, M&A and commercialization deals. The team is recognized for its strengths in finance and its experience assisting pharmaceutical companies with fundraising for Covid-19 treatments. Of recent note, the team represented a US-based financial services client in BioNTech’s $325m Series B financing round—one of the single largest private funding rounds for a biotech company in European history. Los Angeles-based Kimberly Branscome and Jay Bhimani joined from Kirkland & Ellis LLP, strengthening the product liability and mass torts practice. Co-chairs Andrea Reid and David Rosenthal are based in Boston and New York, respectively; product liability co-chair Mark Cheffo, patent litigator Katherine Helm and patent prosecutor Carl Morales are contacts in New York.