ABOUT Cornelius J. Callahan

Mr. Callahan joined the Modesto office of McCormick Barstow in 2015. He represents private companies and public entities as lead trial counsel in litigation matters. Mr. Callahan has extensive experience defending clients in cases involving premises liability, product liability, civil rights, unlawful seizures and contract disputes.


He also advises clients regarding risk management, contract negotiation and drafting, as well as employment issues. Prior to joining the firm, Mr. Callahan was a Partner at Borton Petrini, LLP. Before practicing in the Central Valley, Mr. Callahan was a member of the litigation team of a New York law firm which served as counsel to Fortune 500 and international corporations in mass tort and toxic tort matters.

Honors & Awards

Mr. Callahan is AV Preeminent Peer Review Rated with Martindale-Hubbell.

Community Involvment

Mr. Callahan previously served on the Board of the American Red Cross and currently serves on the Board of the Valley Builders Exchange.

Publications & Lectures

“Slipping through the Cracks (or tripping over the crack): Liability for Uneven & Broken Sidewalks in Front of your Property,” California Defense Magazine, Summer 2004.

“The Admissibility of Expert Scientific Evidence,” California Defense Magazine, Summer 2004.

“Liability for Delivering Your Goods by Truck,” California Defense Magazine, Fall 1999.

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Areas of LAW

  • Litigation

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