Mark J. Leimkuhler, Partner

Mark Leimkuhler has a broad commercial litigation and arbitration practice which focuses primarily on complex insurance and reinsurance coverage disputes.   His practice encompasses counseling as well as litigation and appellate work before federal and state courts and arbitration panels.  For over twenty years he has advised and litigated on behalf of London Market and North American insurers and reinsurers on a wide variety of issues.  These include environmental, asbestos, health hazard, political risk, workers’ compensation, personal accident, medical, professional liability and other claims; loss allocation; reinsurance accounting issues; and claims of misrepresentation and nondisclosure in the procurement of coverage.   

Mr. Leimkuhler has also successfully litigated non-insurance matters involving claims of fraud, breach of contract, professional negligence, interference with property rights, and discrimination in employment and public accommodations.  He was co-lead counsel in a national class action on behalf of plaintiffs who alleged that they were denied equal access to health club memberships on account of race, which resulted in one of the largest settlements in a U.S. public accommodations discrimination matter.

In the News

• Uncertainty abounds for Egypt

Publications, Presentations and Events

• "London Market DRs and RDRs"

Representative Matters

• Successfully led client to recission against a Fortune 100 company in a Missouri state court trial, avoiding $70 million of potential liabilities
• A New Jersey state Court disallowed a policyholder’s claim for radionuclide cleanup costs and a large portion of other environmental response costs
• Through arbitration, secured an award of tens of millions of dollars in favor of the firm’s client against a company that had reinsured the client’s workers’ compensation and other liabilities 

Professional Affiliations

• District of Columbia Bar
• AIDA Reinsurance and Insurance Arbitration Society – U.S.
• Law Firm Representative, Washington Lawyers Committee For Civil Rights & Urban Affairs (former)

Past Professional Experience

• Associate, Wilmer Cutler & Pickering