About Jon

Jon O’Connell is a Partner and founding member of Atrium’s legal team. He advises startup clients on matters ranging from corporate governance, capital raising, commercial transactions, and mergers and acquisitions. He also represents venture capital funds in equity financings. From 2017-2019, he managed Atrium’s venture capital financing team which was one of the most active venture capital financing teams in the industry having completed over 100 preferred stock equity financings in that time period.

Prior to joining Atrium, he practiced at Morrison & Foerster in San Francisco and Wilmer Cutler Pickering Hale and Dorr in Palo Alto. At these firms, he often acted as outside general counsel for hundreds of startups in industries ranging from foodtech to fintech. He joined Atrium in order to enhance the client experience through the application of technology and operational improvements. As one of the first attorneys to join Atrium, he helped pioneer the development of Atrium’s industry-leading legal technology tools that automate workflows like complex pro forma cap table generation.

When he’s not working, you can find him caring for his newborn daughter, golfing, watching sports, or gardening his backyard where he grows vegetables and raises chickens. He’s also active in his professional networks often speaking at industry events like Tech GC’s Fullstack Conference.

Jon received his J.D. from Santa Clara University School of Law and Bachelor’s Degree from the University of California, Santa Barbara.


  • Morrison & Foerster LLP
  • Wilmer Cutler Pickering Hale and Dorr LLP
  • Santa Clara University School of Law
  • University of California, Santa Barbara


  • Corporate
  • Emerging Companies
  • Venture Capital

“I joined Atrium to grow a better law firm from the ground up by utilizing technology to reduce the inefficiencies which frustrate lawyers and clients alike.”

-Jon O'Connell