John P. O'Neil joined Elk & Elk Co., Ltd. in 2012 as an equity partner. He is one of the firm's leading medical malpractice and personal injury attorneys, whose practice focuses primarily upon death and catastrophic loss cases. Prior to joining Elk & Elk, John spent 14 years at one of Ohio’s top defense law firms, where he served as a practice area chair and member of the firm's management committee and executive group. He also spent time working as a successful prosecutor in the Dade County State Attorney's Office. Over the years, John has successfully tried more than 80 jury trials in various areas of law, including medical malpractice, transportation, legal malpractice, premises liability and others. John's first chair jury trials are in state and federal courts, and he has argued in the Eighth District Court of Appeals, Ohio Supreme Court and Sixth Circuit Court of Appeals.

John practices with the Ohio firm of Elk & Elk Co., Ltd., located in Mayfield Heights. He received his undergraduate degree from Miami University in Oxford, Ohio and his law degree from John Marshall Law School in Chicago, Illinois.

John is married and has four children.