Mark R. Kaster

Mark R. Kaster




Mark’s practice emphasizes complex matters involving federal, state and local regulatory agencies. The increasing body of rules and regulations presents enterprise risk concerns to businesses. Mark works with clients and regulatory agencies to find solutions to critical business challenges. Mark approaches these complex relationships to find creative solutions that help clients meet their business objectives and regulatory obligations.

Mark’s practice started with environmental, health and safety risk management. He has a Master’s degree in public health, and was on the legal defense team in one of the first Superfund cases litigated in the United States. That grounding led to the representation of many Fortune 500 companies in connection with their operations, chemical control, work place safety, contamination matters, product safety, insurance and litigation.

Mark has national expertise in handling enterprise risk management, occupational and mine health and safety, accidents/fatality matters, hazardous materials laws, federal and state product safety and toxic tort laws, chemical regulations, and green marketing. Mark started the Dorsey Environmental Evaluation Program (DEEP) to assist clients in their due diligence, corporate compliance, workplace safety and product safety business operations and transactions. The DEEP program helps clients manage their environmental, health and safety risks with comprehensive services, rapid response, practical advice and solutions.

Mark is a partner in Dorsey’s Regulatory Affairs Group.

Education & Admissions

William Mitchell College of Law (J.D., 1984), Law Review: Environmental Law Symposium
Law Journal, Torts and Insurance Law Section

University of Exeter (U.K.) (Law Program, 1982)

University of Minnesota (M.S., 1982), School of Public Health

University of Minnesota (B.S., 1979), College of Biological Sciences; Student Service and Leadership Award; CLA Interdisciplinary Board


  • Minnesota


Representative Experience

  • On the defense team in one of the first national Superfund cases (U.S. v. Reilly Tar and Chemical Co.) that helped define the boundaries of Superfund liability.
  • On the plaintiff team in Kennedy Building Associates v. Westinghouse, a case in which defendants were ordered to pay millions of dollars for a PCB cleanup.
  • Has handled PCB and TCE exposure cases nationwide, including a South Carolina case in which Mark structured a creative settlement with an annuity program to offset future damages.
  • Has handled numerous workplace fatality matters, including advising companies faced with the tremendous challenges and impacts to the core of a company’s business operation.
  • Defended numerous companies in administrative matters before federal and state safety agencies, and before the federal mine safety administration.
  • Has been a principal adviser to Fortune 500 companies nationwide, including a major refinery, electronics manufacturers, mining operations, and large petroleum service companies.
  • Regularly counsels an international standard setting organization in their legal risk analysis.
  • Has helped advise foreign government agencies in Asia on U.S. environmental, health and safety risks and liabilities.
  • Has worked with large Ag co-ops and food manufacturing companies in response to product contamination matters, and has advised companies on numerous product recalls and related claims.
  • Has advised clients on California Proposition 65 claims as well as green chemistry initiatives and product contamination claims.
  • Established the DEEP program to help clients evaluate environmental, health and safety risks in their business transactions and operations, including work in M&A and real estate matters.

News & Resources


WARNING: The Prop 65 Transition Period is Over!
Prop 65 Developments Relevant to the Food & Beverage Industry: Changes On Three Important Fronts
FDA Issues Three New Rules Under the Food Safety Modernization Act
OSHA Reporting and Recordkeeping Rule-Practical Law Journal
OSHA Updates Reporting and Recordkeeping Rules
Enterprise Risk Management: Ways to Prepare for and What to Do During a Recall
Do Your Paper Products Comply With The Lacey Act?
Consumer Product Safety: A New Wave of Regulation May Lead to Increased Product Liability
Playback: Navigating the Consumer Product Safety Improvement Act (CPSIA)
Consumer Product Safety Improvement Act of 2008

News & Press Mentions

51 Dorsey Lawyers in Minneapolis Selected for Inclusion in The Best Lawyers in America 2018 and 2018 Lawyers of the Year
48 Dorsey Lawyers in Minneapolis and Fargo Selected for Inclusion in The Best Lawyers in America 2017 and 2017 Lawyers of the Year
Dorsey Partner Mark Kaster quoted in Financial Times on safety compliance and how corporate boards should respond
45 Dorsey Lawyers in Minneapolis and Fargo Selected for Inclusion in "The Best Lawyers in America®" 2016 and "Best Lawyers of the Year"
Dorsey’s Minneapolis Office Named - Complex Civil Litigation Law Firm of the Year in Minnesota
Dorsey Parter Mark Kaster Discusses Prop 65 in Baby Food Case
Dorsey & Whitney Represents Tri-State in $1.59 billion Debt Refinancing

Legal Writings

  • Dorsey & Whitney LLP ConsumerProductsLaw Blog
  • Midwest Center for Occupational Health Symposium
  • EDR Due Diligence at Dawn
  • NBI OSHA Compliance Update
  • Minnesota Air Quality Handbook
  • Government Institute's Environmental Law Handbook

Select Presentations

  • Minnesota State Bar Association 10th Annual Real Estate Symposium
  • Government Institute's Symposium
  • American Women's Society of Certified Public Accountants Symposium
  • EDR Due Diligence at Dawn Seminars
  • OSHA Symposium, National Business Law Institute
  • National Auditing Roundtable Conference
  • Minnesota State Bar Association Real Estate Conference
  • Minnesota State Bar Association Symposium on Mold Claims
  • Webinar on CPSIA Consumer Product Safety Law
  • Strafford Consumer Product Safety Teleconference

Industries & Practices

Government Enforcement & Corporate Investigations
  • Development & Infrastructure
  • Energy & Natural Resources
  • Environmental
  • Food, Beverage & Agribusiness
  • Government Enforcement & Corporate Investigations
  • Hospitality
  • Insurance Law
  • Israel
  • Labor & Employment
  • Mergers & Acquisitions
  • Mining
  • Products Liability
  • Project Development & Finance
  • Real Estate & Land Use
  • Sustainability

Professional & Civic

Professional Achievements

  • Minnesota State Bar Association and Hennepin County Bar Associations
  • Rocky Mountain Mineral Law Foundation Member
  • Certified Civil Arbitration Training and Registered Third Party Neutral
  • American Bar Association Member
  • National Auditing Roundtable
  • Faculty, Minnesota Institute of Legal Education and the Midwest Center for Occupational Health and Safety
  • Adjunct Professor, Hamline University

Community Involvement

  • Participates in Dorsey’s pro bono challenge and has dedicated time and resources to pro bono activities, including work on expungement matters.


  • Listed in Best Lawyers in America© for Administrative Law, 2010-2019

North Star Lawyer logo

Mark R. Kaster