Mark Wiletsky


Holland and Hart, LLP

Mark Wiletsky partners with clients to provide timely, practical solutions to difficult business challenges, from employment-related issues to unfair competition and other business disputes, so that clients can stay focused on achieving their business objectives.

Businesses today face a variety of challenges, from compliance issues in the highly regulated health care industry to competitors trying to steal trade secrets, proprietary information, poach employees, file frivolous lawsuits, or gain market share through unlawful competition. Mark helps companies in these areas by developing a thorough understanding of the business and finding creative solutions, whether that comes in the form of aggressively prosecuting or defending claims in court, preparing written agreements, or negotiating a resolution to meet his clients’ needs. Mark has extensive experience with labor and employment law, health care issues, and commercial litigation, handling complex disputes involving real estate developments, ownership rights, and defamation, among others.

When disputes arise, escalate, and require litigation, Mark draws on over 20 years of experience representing businesses in state and federal courts, administrative hearings, and arbitrations. Mark is also an effective appellate advocate, handling cases in state and federal appellate courts around the country.

Mark regularly blogs at He is actively involved in the Employment Law Alliance (ELA), one of the world’s largest labor and employment lawyer networks, that provides multi-state and multinational companies with seamless, cost-effective services worldwide.

Mark is the Labor & Employment Practice Group Leader. He previously served as the Administrative Partner of the Boulder office.

Areas of Expertise

  • Labor and Employment
  • Healthcare Law
  • Trade Secrets and Non-Competes
  • Employment Litigation and Class Actions
  • HR Counseling, Compliance, and Risk Management
  • Discrimination, Harassment, Retaliation, and Litigation
  • Accommodations, Disabilities, Leaves
  • Labor and Management Relations
  • Wage and Hour
  • Class Actions
  • Appellate


  • University of Colorado School of Law
    J.D., 1997
  • Northern Arizona University
    B.A., 1993, cum laude


  • Chambers USA: America’s Leading Lawyers for Business, Labor & Employment, 2018-2021
  • The Best Lawyers in America© Litigation – Labor and Employment, 2013-2022
  • Colorado Super Lawyers®, Employment & Labor, 2019-2021
  • Colorado Super Lawyers® Rising Stars, 2011