Mark Grider 

Partner – Washington
T.+1 202 862 2323
700 Sixth Street, N.W.
Washington, DC 20001 V-CARD

Mark Grider is a partner in Cadwalader’s White Collar Defense and Investigations Group and leads the firm’s Crisis Management and Congressional Investigations Practice.

Mark has worked across multiple administrations, most recently serving as a Deputy Associate Attorney General in the office of the Associate Attorney General in the Department of Justice, where his portfolio included criminal matters relating to the Antitrust Division, Civil Division, the Consumer Protection Branch, Environment and Natural Resources Division and the Tax Division. He is a subject matter expert on the False Claims Act, healthcare fraud, the opioid crisis, and competition and consumer harm in the online marketplace. Mark liaised on policy initiatives relating to elder fraud and financial exploitation as well as criminal antitrust procurement collusion. Prior to that, he served in the Executive Office of the President as Senior Associate Counsel and Special Assistant to the President in the Office of the White House Counsel, advising White House Counsel and senior administration officials on broad oversight and regulatory matters involving the White House, Health and Human Services, and federal agencies contributing special expertise on health care regulatory and litigation matters and science and technology oversight and policy issues. Between early 2019 and September 2020, he assisted on congressional oversight and investigations and coordinated responses to related litigation, FOIA requests, and Inspector General investigations. Mark has held a number of other high-profile roles, including as a federal prosecutor in the Eastern District of Virginia, Special Counsel for Health Care Fraud and executive director of the DOJ’s Intellectual Property (IP) Task Force, and as a special trial attorney in both the civil and criminal fraud sections of the Department of Justice. Mark also has extensive congressional investigative experience on Capitol Hill in both the House and Senate.

Mark also worked as a deputy compliance officer in a Fortune 500 healthcare company that was under a HHS-OIG Corporate Integrity Agreement. He knows firsthand how to counsel companies and boards on effective detection of fraud, waste and abuse and how best to refer or disclose possible fraud matters to government agencies. In addition, Mark managed False Claims Act and bribery investigations for the DOJ’s Civil and Criminal Fraud Sections, was a member of DOJ’s Medicare Fraud Strike Force, and also served as Deputy General Counsel for the Special Inspector General for Iraq Reconstruction. As the executive director of the Justice Department’s Task Force on Intellectual Property, Mark spoke internationally on government enforcement strategies for corporate and small-business trade secret and intellectual property protection. Mark also has extensive experience on capitol hill, having served as a staffer to Senator John Ashcroft and later on a Special House Investigations Committee.

Mark received his J.D. from the University of Missouri School of Law, where he was a Thurgood Marshall Scholar. He received a B.A., magna cum laude, from Truman State University.

Mark is a member of the D.C. and Missouri Bars, and is admitted to practice before the Supreme Court of the United States and the U.S. Court of Appeals for the Fourth Circuit.

  • Represented multiple CEOs before the U.S. Senate Select Committee on Intelligence and the House Permanent Select Committee on Intelligence related to congressional investigation of potential Russian activities impacting the 2016 Presidential election.
  • Advised clients on Department of Justice (DOJ) asbestos trust fund fraud, waste and abuse strategies.
  • Represented universities, athletes and victims before Congress, law enforcement, and federal agencies in sexual harassment and assault investigations and crisis management.
  • Represented multinational company in pending Department of Justice (DOJ) National Security Division investigation.
  • Represented large regional hospital organization before Department of Health and Human Services and Centers for Medicare and Medicaid Services.
  • Led internal investigation for Midwest nonprofit organization into allegations of possible leadership misconduct.
  • Advised clients on Drug Enforcement Administration and DOJ strategic enforcement and diversion matters.
  • Represented international Fortune 500 company on trade sanctions matter brought by Office of Foreign Assets Control.
  • Obtained successful outcomes for clients in Congressional investigations before House Intelligence Committee and other Congressional oversight Committees.
  • Counseled publicly traded Fortune 1000 company and trained employees on Foreign Corrupt Practices Act and United Kingdom Bribery Act compliance.
  • Successfully resolved contractual matter before U.S. State Department for international company with business in Qatar.
  • Advised government contractor on alleged bribery investigation involving state attorney general and inspector general.
  • Successfully represented a healthcare client in an opioid healthcare investigation in Southern District of New York.
  • Successfully represented clients before DOJ and FBI regarding complex cybersecurity matters.
  • Successfully represented CEO before the Department of Labor in an investigation involving possible ERISA violations.
  • Represented clients in enforcement and regulatory proceedings before Congress, the U.S. Departments of Justice, Labor, Commerce, Transportation, Treasury, Health and Human Services, as well as the Centers for Medicare & Medicaid Services and Department of Veterans Affairs.

Note: certain representations occurred prior to Mark's association with Cadwalader.

Mark Grider 


  • U.S. Court of Appeals, 4th Circuit
  • U.S. Supreme Court
  • District of Columbia
  • Missouri


  • University of Missouri School of Law
  • Truman State University
    B.A., magna cum laude