Judge Jonathan L. Rosenbloom

Judge Jonathan L. Rosenbloom has served on the Los Angeles County Superior Court since his appointment by Governor Jerry Brown on June 4, 2018, filling the vacancy created by the retirement of the Hon. Leland H. Tipton. He received his undergraduate education at the University of California, Berkeley and his law degree from Northwestern University School of Law. His pre-bench career spanned multiple law firms from 1989 through the mid-1990s, including associate positions at Berman, Blanchard, Mausner, and Kindem; Maiden, Rosenbloom, Wintroub, Fridkis, and Resser; and Anker, Hymes, and Schreiber, before he advanced to partnership. The two notable cases on record provide concrete insight into the types of matters that have come before Judge Rosenbloom. In December 2024, he ordered an animal rights activist to repay millions of dollars taken from a 97-year-old, demonstrating a willingness to impose significant financial remedies in cases involving elder financial abuse. In 2023, he presided over a probate matter in which the Court of Appeal subsequently directed him to admit a will to probate that lacked the signatures of two witnesses — indicating that his ruling on that matter was reversed on appeal. With no analyzed rulings, attorney observations, or ingested content available beyond these two case references and his biographical profile, the intelligence picture for Judge Rosenbloom remains limited. Attorneys should treat the following analysis as grounded in the available factual record and supplement it with direct courtroom observation.

Given Judge Rosenbloom's documented background in private practice across multiple litigation-oriented firms before his appointment, attorneys should come prepared with thorough factual records and well-organized evidentiary presentations. His December 2024 ruling in the elder financial abuse matter — ordering repayment of millions — reflects a court willing to impose substantial monetary remedies when the factual record supports them. Attorneys representing plaintiffs in financial abuse or elder exploitation cases should ensure the evidentiary record is comprehensive and that damages calculations are precise and well-documented. The 2023 probate case that was reversed on appeal is a concrete data point attorneys cannot ignore. The Court of Appeal directed admission of a will that lacked two witness signatures, overturning Judge Rosenbloom's ruling. Attorneys in probate matters before him should be prepared to brief the applicable statutory and case law on will formalities thoroughly, and should not assume that technical deficiencies in a testamentary instrument will automatically be dispositive in his courtroom — or that they will not be. The appellate reversal signals that his interpretation of probate formality requirements was not upheld, and counsel should be prepared to argue both sides of formality-versus-intent questions with full citation to current authority.

• critical

  Research Current Probate Formality Case Law Thoroughly

  Given the appellate reversal in the 2023 probate matter, attorneys in any probate proceeding before Judge Rosenbloom should brief will formality and testamentary intent issues with full citation to current statutory authority and Court of Appeal decisions. Do not assume his initial instincts on formality questions will align with appellate precedent.

• critical

  Prepare Comprehensive Damages Documentation in Financial Abuse Cases

  The December 2024 elder financial abuse ruling demonstrates that Judge Rosenbloom will order substantial repayment when the record supports it. Plaintiffs should prepare precise, well-documented damages calculations with supporting evidence to maximize the strength of any financial remedy request.

• important

  Conduct Direct Courtroom Observation Before First Appearance

  With no analyzed rulings or attorney observations in the database, attorneys should observe Judge Rosenbloom's courtroom directly before their first appearance to assess his procedural preferences, hearing management style, and demeanor with counsel.

• important

  Review Stanley Mosk Courthouse Local Rules and Department Procedures

  Confirm the specific department assignment and any standing orders or local rules applicable to Judge Rosenbloom's courtroom at the Stanley Mosk Courthouse, as these govern procedural requirements that are not captured in the current data.

• important

  Consult Attorneys with Recent Appearances Before This Judge

  Given the absence of attorney observations in the database, direct consultation with practitioners who have recently appeared before Judge Rosenbloom is the most reliable way to supplement the limited available intelligence.

• ›Arrive with a fully organized evidentiary record — the financial abuse ruling demonstrates that Judge Rosenbloom engages with factual detail when imposing significant remedies.
• ›In probate matters, be prepared to argue both the technical formality requirements and the intent-based doctrines, as his 2023 ruling on will formality was reversed on appeal.
• ›Treat this judge as one with substantial private practice experience — present arguments with the same rigor you would use before a seasoned litigator who understands procedural and substantive law from the practitioner's perspective.
• ›Do not rely on assumptions about his ruling tendencies derived from limited data — prepare for multiple outcomes on contested legal questions.