Philadelphia Office
1835 Market Street - Suite 1400
PA 19103
New York Office
5 Penn Plaza - 23rd Floor
New York
NY 10001
215.569.2198 phone215.568.6603

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Mark B. Sheppard

Partner | Litigation


Mark B. Sheppard is a partner in the firm’s Litigation Practice Group. He has focused his practice on white collar criminal defense, U.S. Securities and Exchange Commission Enforcement and complex commercial civil litigation for more than 30 years.

Mr. Sheppard has successfully represented corporations, publicly elected officials and individuals in matters involving federal, state, and administrative enforcement activity, including federal criminal trials, grand jury investigations, SEC enforcement actions and government initiated civil proceedings. He regularly counsels clients on conducting internal investigations and implementation of corporate compliance policies.

Mr. Sheppard also has a broad base of civil trial and appellate experience. He regularly represents parties in complex commercial matters, including actions grounded in fraud and in connection with other business torts. He has tried a number of cases in both state and federal courts and argued appeals before the Pennsylvania Supreme and Superior Courts and the U.S. Court of Appeals for the Third Circuit.

Mr. Sheppard’s recent bankruptcy litigation experience includes:

  1. overseeing the investigation of and ultimately obtaining court approval to bring a $1.5 billion fraudulent conveyance/breach of fiduciary duty claim against the debtor’s multi-national parent, and
  2. co-leading trial counsel for asbestos creditor’s committee, resulting in a finding of estimated liability on the part of the debtor in excess of $1.1 billion.

Mr. Sheppard enjoys an AV rating from Martindale Hubbell and is listed in The Best Lawyers in America©. He has been recognized by his peers as a Pennsylvania Top 100 Super Lawyer, and was named “Best of the Bar: Philadelphia’s Top Lawyers” by Philadelphia Business Journal in 2017.



Dickinson School of Law, J.D., with honors

Lehigh University


American Bar Association, White Collar Section

Federal Bar Association, White Collar Section

National Association of Criminal Defense Lawyers

Joint State Government Commission's Advisory Committee on the Philadelphia Court System

Member of the White Collar Section and the Lawyers Assistance Committee,  Philadelphia Bar Association

Past President and Executive Committee Member,  Pennsylvania Association of Criminal Defense Lawyers

Judge Pro Tempore,  Philadelphia County Court of Common Pleas

Pennsylvania Commission on Sentencing

Board of Directors,  Mirmont Treatment Center

Board of Directors and Executive Committee Member,  Lawyers Concerned for Lawyers of Pennsylvania

Board of Directors,  M. Patricia Caroll Fund


Awards and Honors

Super Lawyers© Top 100 Lawyers in Pennsylvania (2018)

Named a Pennsylvania Super Lawyer (2005-2019)

Named "Best of the Bar: Philadelphia's Top Lawyers" by Philadelphia Business Journal (2017)

Winner, Corporate Livewire Awards: Fraud & White Collar Crime (2016)

Martindale Hubbell AV Rated

Listed in The Best Lawyers in America©" for Criminal Defense: White Collar

Received "Lawyer of the Year" distinction by The Best Lawyers in America© (2020)