John C. O'Neill
Of Counsel

Professional Summary

John C. O’Neill advises clients on corporate and securities, emerging growth technology, mergers and acquisitions, and strategic joint ventures. John’s practice focuses on business transactions, commercial contracts, corporate and venture formations, mergers and acquisitions, private equity offerings, financing, equity compensation, corporate governance and nonprofit organizations. He also has extensive experience in representing manufacturers, distributors, retailers, e-commerce business, nonprofit corporations and service businesses.


  • Martindale-Hubbell® AV Preeminent Rating
  • "Top Lawyers," San Diego Magazine, 2013-2017
  • Southern California's Top Rated Lawyers - 2012-2015
  • Top Rated Lawyers in Mergers and Acquisitions – 2012
  • Top Rated Lawyers in Securities Law – 2013
  • Top Rated Lawyers in Technology Law – 2013


  • American Bar Association
  • City of San Diego Ethics Commission (2009 – 2015) — Past Chair
  • San Diego County Bar Association
  • San Diego County Taxpayers Association – Executive Committee, Board of Directors Past Chair


  • LL.M. (Taxation), University of San Diego School of Law, with honors, 1989
  • JD, University of San Diego School of Law, magna cum laude, 1979
  • BA, Dartmouth College, 1975