Mark F. Sheridan

Mark F. Sheridan

Holland & Hart LLP

Recognized since 2003

Denver, Colorado

Practice Areas

Litigation - Antitrust

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Mr. Sheridan guides clients through the complexities of commercial litigation. With more than 30 years of experience, he understands the needs of his clients who are facing the possibility of a trial.

His background includes trial, appellate, arbitration and alternative dispute resolution experience, including extensive work in antitrust, breach of contract, real property, land use, oil and gas, water rights, Indian law and litigation arising out of administrative regulation of business.

Mr. Sheridan began practicing law in Chicago in 1976, moving to New Mexico in 1981, where he was a member of Campbell, Carr, Berge & Sheridan, P.A. until its merger with Holland & Hart on January 1, 2001. In 1995-96, Mr. Sheridan served as a trial attorney in the Antitrust Division of the Department of Justice in Washington, D.C. and was a recipient of the Division's 1995 Outstanding Contribution Award. Mr. Sheridan was the administrative partner in Holland & Hart's Santa Fe office in 2001, and served as the firm's resident partner in Washington, D.C. in 2002-2003.

Contact & Links


  • 555 Seventeenth Street, Suite 3200
    Denver, CO 80202-3979

Bar Admissions

  • New Mexico, State Bar of New Mexico
  • Illinois, Illinois State Bar Association


  • American Bar Association - Member

Holland & Hart LLP
Headquarters: Denver, Colorado

185 The Best Lawyers in America® awards

61 Best Lawyers: Ones to Watch® in America awards

Best Law Firms Badge Full Firm Profile

Recognized in The Best Lawyers® in America 2023 for work in:

  • Litigation - Antitrust


  • Listed in Southwest Super Lawyers
  • Listed in Chambers USA nationwide for Native American Law in 2012 and 2013


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