Karen M. Lager is a Partner with Marks, O’Neill, O’Brien, Doherty & Kelly. She is admitted to practice in New York (Northern, Eastern, Southern and Western District), Connecticut (District) and Florida. 

Karen graduated from George Washington University in 2005, cum laude, with a Bachelor of Business Administration. She then attended Nova Southeastern University, Shepard Broad Law School, graduating in 2008.  During law school, she was the recipient of the Torts Book Award.

Prior to joining Marks O’Neill, Karen gained valuable experience as a summer associate in the legal department of a leading securities rating firm.  Additionally, as a summer associate in a boutique securities firm in Florida, Karen conducted a survey and tabulated research for an article published in the PIABA Bar Journal, Winter 2006 edition, evaluating the possible bias of industry arbitrators in three person arbitration panels.

Since joining Marks O’Neill in 2009, Karen has represented clients in both federal and state courts in the areas of professional malpractice, insurance coverage disputes, declaratory judgment actions, first amendment retaliation claims, products liability and general liability claims.  She has extensive experience defending professionals in actions brought by prior clients, banks and other individuals asserting causes of actions for malpractice, fraud, breach of contract and breach of fiduciary duties.  She also has experience assisting and advising clients in responding to subpoenas in both state and federal courts.

In Karen’s free time, she enjoys working out, cooking, traveling and exploring New York City’s dining scene with her husband.

Karen M. Lager

Phone 646-454-4870
Email KLager@moodklaw.com

Karen M. Lager PDF


  • J.D., Nova Southeastern University Shepard Broad Law Center, 2008
  • B.B.A., The George Washington University School of Business, cum laude, 2005

Bar Admissions

  • Connecticut, 2008
  • Florida, 2009
  • New York, 2009
  • U.S. District Court for the Northern District of New York, 2017
  • U.S. District Court for the Eastern District of New York, 2009
  • U.S. District Court for the Southern District of New York, 2009
  • U.S. District Court for the Western District of New York, 2010
  • U.S. District Court for the District of Connecticut, 2011
  • U.S. Court of Appeals for the Second Circuit, 2010

Bar Associations

  • American Bar Association
  • Connecticut Bar Association
  • The Association of the Bar of the City of New York

Practice Areas

  • Casualty Group
  • Employment Law, Municipal & Public Entity
  • Professional Liability
  • Toxic Tort, Mass Tort, Environmental and Products Liability

Representative Cases