Mark Dreyer has litigated cases since 1988.  His practice includes representing different segments of the gas fuels industry, the vehicle rental industry, and product manufacturers.  Mark has defended propane retailers, wholesalers, and tank manufacturers in personal injury, wrongful death, and property damage claims in twenty states, as well as provided counsel regarding regulatory compliance matters.  He has also represented gas utilities in personal injury and property damage claims.  Mr. Dreyer's work for the vehicle rental industry includes representing a major vehicle rental excess liability insurer in coverage disputes across the country, and providing general risk management advice to rental car companies.  His vehicle rental risk management work has entailed counseling regarding traditional, self-insured and fronted insurance programs, drafting manuscript coverages, and structuring coverage under a risk retention group.  Mark has served as defense counsel to vehicle rental companies in connection with major personal injury and wrongful death claims and insurance coverage disputes.  Mr. Dreyer has also successfully represented a major vehicle rental company in connection with over 150 claims and suits brought against it following the bankruptcy of one of the company's major licensees.  Mark's experience representing the vehicle rental, energy and insurance industries in litigation matters is illustrated by the following reported decisions:

JP Energy Marketing, LLC v. Commerce and Indus. Ins. Co., 2018 OK CIV APP 14 (deciding two issues of first impression in favor of client, JP Energy)

JP Energy Marketing, LLC v. Commerce and Indus. Ins. Co., 2018 OK 11 (Issue of first impression decided in favor of client, JP Energy)

Diaz v. Philadelphia Indemnity Insurance Company, 143 Wn.2d 57, 17 P.3d 603 (2001)

Carco Rentals, Inc. v. Philadelphia Indemnity Insurance Company, 923 F.Supp. 1143 (W.D. Ark. 1996)

Garnett v. WRP Enterprises, Inc., 669 S.E.2d 591 (S.C. 2008) (Oral argument before the South Carolina Supreme Court)

In addition to representing the interests of the propane and gas fuels industry, Mr. Dreyer also regularly defends product manufacturers in personal injury and property damage claims, including claims of defective design and manufacturing, failure to warn, negligence, and breach of warranty; and has provided counseling regarding product hazard notifications to the Consumer Protection Safety Commission.  He has been engaged to defend nursing homes against claims of negligence and abuse.  Mr. Dreyer has considerable experience representing franchisors in franchise disputes, including trademark infringement claims.

Mr. Dreyer is a past member of the Parent Child Center of Tulsa Board of Directors, a past President of the University of Tulsa College of Law Alumni Association, and is currently a Fellow of the Litigation Counsel of America and a member of the International Association of Defense Counsel.  Mr. Dreyer is listed in The Best Lawyers in America publication (Commercial Litigation) and is also recognized in the Super Lawyers publication.  Mr. Dreyer has also been selected as a "Local Litigation Star" in the Commercial and Insurance categories for multiple years by Benchmark Litigation.


Successfully represented a nationwide rental vehicle franchisor in over 150 claims and lawsuits following its largest franchisee’s bankruptcy.

Represented a product manufacturer in connection with a “fast track” recall program under the Consumer Product Safety Act.

Represented a specialty insurance carrier as national insurance coverage counsel for its rental car insurance products.

Acted as national defense counsel for product manufacturers and gas companies in product liability defense, gas explosion litigation and litigation arising out of catastrophic accidents in the defense of over personal injury suits in over 20 states.

Served as national litigation counsel for the largest propane tank manufacturer in the United States and a midstream energy distribution company, and as national counsel for crane, oilfield and industrial equipment suppliers.

Provided counseling and litigation services to both insureds and insurers in coverage disputes involving large property losses, business interruption losses, extra expense claims, and general liability claims

Honors & Leadership

Honors & Recognitions

American Jurisprudence Award, Commercial Law

Author of "Constitutional Problems with Statutes Regulating Ballot Position," 23 Tulsa Law Journal 123 (1987), reprinted in Parliamentary Journal Vol. XXX No. 4 (October 1989), cited in Morse v. Republican Party of Virginia, 517 U.S. 186 (1996), Green Party of Tennessee v. Hargett, 953 F. Supp. 2d 816 (M.D. Tenn. 2013), and New Alliance Party v. New York State Board of Elections, 861 F. Supp. 282 (S.D.N.Y. 1994)

Tulsa Law Journal Notes & Comments Editor 1987 - 1988 and Member 1986 - 1987

University of Tulsa College of Law Honor Roll

Parent and Child Center Board of Directors

University of Tulsa College of Law Alumni Association Board of Directors Outstanding Committee Chair, 2000; Treasurer, 2001; Exemplary Services Award, 2001; Vice President, 2002; President-Elect, 2003-2004; President, 2004-2005; Presidential Service Award, 2005

Fellow, Litigation Counsel of America

Listed in Best Lawyers in America© (Commercial Litigation) (2010-2020)

Recognized in Oklahoma Super Lawyers

Recognized for multiple years as a "Local Litigation Star" in the Commercial and Insurance categories in Benchmark Litigation

Community & Professional

Tulsa County Bar Association

Oklahoma Bar Association

American Bar Association

Propane Gas Defense Association

Natural Gas Claims and Litigation Association

International Association of Defense Counsel


Alerts & Publications


University of Tulsa College of Law, J.D., 1988

Washington University, St. Louis, B.A., 1985


  • North Carolina - 1988 (currently inactive)
  • Oklahoma - 1992
  • U.S. District Court, M.D. of North Carolina
  • U.S. District Court, E.D. of Oklahoma
  • U.S. District Court, N.D. of Oklahoma
  • U.S. District Court, W.D. of Oklahoma
  • U.S. Court of Appeals, Third Circuit
  • U.S. Court of Appeals, Tenth Circuit
  • U.S. Court of Appeals, Eleventh Circuit
  • Admitted on a pro hac basis in 21 states
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