Mary Kay Vyskocil

Senior litigation partner at Simpson Thacher & Bartlett

Mary Kay Vyskocil is a senior litigation partner at Simpson Thacher & Bartlett where she handles complex commercial litigation. Her practice is concentrated in insurance and reinsurance coverage litigation, securities cases, as well as cases involving the financial services industry. Ms. Vyskocil has been involved in the representation of major domestic and foreign insurers in complex coverage litigations (including numerous jury trials and appellate arguments) throughout the U.S. in a wide variety of contexts, including environmental, asbestos, breast implants, and other mass tort claims. Ms. Vyskocil was one of the lead trial counsel in Shell Oil Company v. Accident & Casualty Insurance Company in California regarding coverage for environmental liabilities at the Rocky Mountain Arsenal. She represented a major insurer in several coverage litigations seeking insurance for Y2K remediation expenses. Ms. Vyskocil represents the lead insurer with respect to coverage issues arising out of the World Trade Center attack, including a trial on the property insurance program, which resulted in a jury verdict in the lead insurer's favor. Ms. Vyskocil is also active in reinsurance litigations and arbitrations in the U.S., Great Britain, and Bermuda. She has argued a number of precedentially important reinsurance cases, including decisions issued by the Second Circuit and the New York Court of Appeals relating to "follow the fortunes" and reinsurance treaty interpretation. Ms. Vyskocil is a frequent lecturer and author on insurance and reinsurance coverage issues and on litigation and trial skills at continuing legal education seminars and bar association meetings. She is the immediate past chair of the board of directors of ARIAS-U.S. and currently chairs its strategic planning committee. Ms. Vyskocil has consistently received numerous first-tier national and state rankings in publications such as Chambers, Legal 500, and Benchmark Litigation.