Margaret Warner > McDermott Will & Emery LLP > Washington DC, United States > Lawyer Profile

McDermott Will & Emery LLP
WASHINGTON, DC 20001-1531
United States
Margaret Warner photo

Work Department

Litigation & Dispute Resolution


Margaret Warner has served as first chair trial and appellate counsel in state and federal courts in over 30 jurisdictions. Her work has spanned antitrust, commercial, class action, environmental, healthcare, insurance, mass tort, product liability and reinsurance disputes. Margaret has taken numerous cases to verdict/judgment before juries, judges and arbitration tribunals. Many of her cases have involved high-profile public policy issues from the Agent Orange litigation in the 1980s, environmental and Superfund litigation involving such notorious sites as Love Canal and the Hudson River in the 1990s, to sexual abuse, 9/11, antitrust, healthcare, ERISA and COVID-19 litigation in the 21st Century.

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Lawyer Rankings

United States > Industry focus > Insurance: advice to insurers

(Hall of Fame)

Margaret WarnerMcDermott Will & Emery LLP

The insurance practice at McDermott Will & Emery LLP helps its broad client base, which includes prominent names in the industry, ‘achieve positive, practical outcomes that make long term sense’. The team handles contentious insurance coverage litigation, reinsurance disputes and offers regulatory advice and representation. Of note is its expertise in captive insurance and risk retention group matters as well as in the insurtech sector. The team is led by Ryan Smethurst, who has a wealth of trial and appellate experience, and Margaret Warner, ‘an outstanding litigator and strategist‘ in Washington DC together with Jane Byrne  in New York, who advises clients in high-value coverage and transactional disputes as well as reinsurance litigation and arbitration.