Jeffrey S. Cohen is Senior Counsel at Keystone Law Group, P.C. with more than two decades experience as an established Probate Attorney. Jeff started his career with a small firm handling probate matters, prior to opening his own private probate practice. In time, Jeff joined a boutique firm in the probate litigation department, handling many matters that involved cross-over probate and family law issues. Subsequently, Jeff practiced in a Top Am Law 100 firm before he decided to join Keystone’s dedicated probate litigation team.

Jeff takes a client-centered approach and considers himself as a “Counselor at Law,” attempting first to understand disputes and potentially resolve matters. That said, Jeff enjoys the advocacy and litigation process, including all elements and stages: pleading, discovery, and trial. Jeff routinely represents financial institutions, professional fiduciaries, and individuals in probate matters, including without limitation, Trustees, Executors, Agents, Beneficiaries, Heirs, Creditors and interested persons to a litany of probate issues, both prosecuting and defending all types of matters.

  • Jeff has been recognized as a Super Lawyer by Super Lawyers Magazine from 2012-2022.

Jeffrey S. Cohen
Senior Counsel

Jeff received his undergraduate degree from California State University, Northridge and his law degree from Southwestern University School of Law. In law school, Jeff received the “CALI Award” in Alternative Dispute Resolution (ADR) and Southwestern’s “Exceptional Achievement Award.”


  • California Lawyers Association, Trusts & Estates and Litigation Sections
  • Los Angeles County Bar Association, Trusts & Estates and Litigation Sections
  • Woodland Hills Tax & Estate Planning Council
Representative Matters
  • Represented clients in administrative probate procedures, conservatorship, and trust issues ranging from small family matters to mega estates. 
  • Represented professional fiduciaries in conservatorship, trust, and estate matters in all regards, including, without limitation, to accounting, asset recovery, and distribution issues.
  • Represented corporate clients regarding substantial estates with tax implications, including accounting, fiduciary, and distribution issues.
  • Represented clients in highly litigated trust and estate matters, all the way through trial and appeals.
  • Represented clients regarding will and trust contests, including, without limitation, to claims of lack of capacity, undue influence, and abuse.
  • Substantial experience representing clients through alternative dispute resolution, in particular, the highly successful process known as mediation which is typically handled before a retired Judge. 
  • Successfully obtained a personal surcharge at trial against a private professional fiduciary who mishandled a trust estate.
  • Successfully handled high-profile media cases with appropriate private resolve outside of the public eye.


Jeff and his family enjoy indoor and outdoor activities, family fun time, including dining, travel, cruising, and camping, as well as television production.