Sean D. Muntz
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Overview
Sean D. Muntz serves as Managing Partner of RMO LLP. Sean is an experienced trial and appellate lawyer, with litigation experience spanning a broad range of subject matters, including banking, general commercial, employment, probate, real estate, securities, intellectual property, maritime and environmental disputes. Sean has litigated matters in state and federal courts throughout California, and in alternative dispute resolution forums, including AAA and JAMS, and before the NASD/FINRA and Pacific Stock Exchange.
Sean’s practice focuses on representing beneficiaries, professional and corporate fiduciaries (administrators, executors, trustees, conservators, and guardians) in contested trust, estate and probate litigation.
Sean previously was a partner at an international law firm in the firm’s commercial litigation group, where he represented international financial institutions in litigation matters.
Sean worked as in-house counsel for a Fortune 100 aerospace manufacturer. There, he represented the company in internal and external investigation and compliance matters. While there, Sean represented the company as a victim of espionage, in the criminal matter of U.S. v. Chung, in which the U.S. District Court handed down the first conviction under the Economic Espionage Act of 1996. For representing the company’s interests, Sean received a commendation from the Los Angeles Field Office of the FBI and the FBI Director.
Sean also has worked for a Fortune 100 financial institution as in-house counsel, where he managed and directed national litigation strategy, overseeing hundreds of cases.
Education
University of Southern California
Juris Doctor
University of Hawaii
BA, Journalism & Political Science
Community & Professional Involvement
- Affiliate Member, Society of Tax and Estate Planning Professionals (STEP)
- Member, ProVisors
- Volunteer, Orangewood Foundation
- Former Member, Black Law Students Association at USC Gould School of Law
Bar Admissions
- Member, State Bar of California
Awards & Recognition
- “500 Leading Litigators in America”, Lawdragon, 2027
- Best Lawyers in America, Litigation – Trusts & Estates, Best Lawyers, 2024-2027
- “Super Lawyer”, Southern California Super Lawyers, 2019-2027
- “Legal Visionaries”, Business of Law Magazine, Los Angeles Times, 2022, 2026
- “Top Estate & Wealth Management Lawyers”, Daily Journal, Los Angeles, 2026
- “Leading Trusts, Estates & Probate Litigation Lawyers – Orange County”, Doyle’s Guide, 2026
- “Orange County Visionary”, Los Angeles Times, 2024-2025
- “Leaders of Influence: Litigators and Trial Lawyers”, Los Angeles Business Journal, 2022
Appellate Opinions
- McCabe v. Wells Fargo Bank, N.A., Cal. Court of Appeal, Fourth Dist., Div. 2
- Jenkins v. JPMorgan Chase Bank, N.A., Cal. Court of Appeal, Fourt Dist., Div. 2
- Pardes v. The Boeing Company, Cal. Court of Appeal, Fourth Dist., Div. 3
- Yun v. JPMorgan Chase Bank, N.A., Cal. Court of Appeal, Fourth Dist., Div. 3
- Gyurec v. Deutsche Bank Nat’l. Trust Co., Cal. Court of Appeal, Fourth Dist., Div. 2
- Welker v. JPMorgan Chase Bank, Cal. Court of Appeal, Fourth Dist., Div. 3
- Palms & Sands Owners Ass’n., Inc. v. Bank of America, Cal. Court of Appeal, Fourth Dist., Div. 1
- Trapp v. U.S. Bank National Ass’n., Cal. Court of Appeal, Fourth Dist., Div. 2
- Sroka v. Bank of America, N.A., Cal. Court of Appeal, Fourth Dist., Div. 3
- Graham v. Bank of America, N.A., Cal. Court of Appeal, Fourth Dist., Div. 1
- Palmer v. JPMorgan Chase Bank, N.A., Cal. Court of Appeal, Fourth Dist., Div. 1
- Sundby v. Bank of New York, Cal. Court of Appeal, Fourth Dist., Div. 1
- Gorton v. Advantix Lending, Inc., Cal. Court of Appeal, Fourth Dist., Div. 2
- Pedery-Edwards v. JPMorgan Chase Bank, N.A., Cal. Court of Appeal, Fourth Dist., Div. 1
- Moore v. ReconTrust Company N.A., Cal. Court of Appeal, Fourth Dist., Div. 1
- Steinke v. Bank of America, N.A., Cal. Court of Appeal, Fourth Dist., Div. 2
- Rosen v. Bank of America, N.A., Cal. Court of Appeal, Fourth Dist., Div. 3
- Jensen v. Huffman, Cal. Court of Appeal, Fourth Dist., Div. 3
- Peralta v. Bank of America Corp., Cal. Court of Appeal, Fourth Dist., Div. 2
- Le Beau v. Bank of America, Cal. Court of Appeal, Fourth Dist., Div. 3
- Mabry v. Superior Court, Cal. Court of Appeal, Fourth Dist., Div. 3
- Harris v. Bank of America, N.A., Cal. Court of Appeal, Fourth Dist., Div. 2
Thought Leadership
Featured in the News
RMO LLP Wins Seven-Figure Judgment in Trust Contest
Probate litigation law firm RMO LLP announced today it has secured a $1.1 million trial award on behalf of its elderly client in a disputed trust contest matter.
Sean Muntz Elevated to Co-Managing Partner of RMO LLP
Probate and trust estate litigation law firm RMO LLP announced today that Partner and Practice Management Chair Sean D. Muntz has been promoted to Co-Managing Partner of the Firm…
RMO LLP’s Sean Muntz, Scott Rahn Named Top Los Angles Lawyers
published on PRNewswire
National probate and inheritance dispute law firm, RMO LLP, announced today that CEO Scott Rahn and firm Managing Partner Sean Muntz have been recognized…
RMO LLP Taps Sean Muntz as Firm Managing Partner
published on PRNewswire
National probate and inheritance dispute law firm, RMO LLP, announced today that veteran probate trial and appellate lawyer Sean D. Muntz has been named the firm’s new Managing Partner.
RMO LLP’S Scott Rahn and Sean Muntz Named “Legal Visionaries”
published by Reuters
National probate litigation law firm RMO LLP announced today that Founding Partners Scott Rahn and Sean Muntz have been recognized by the Los Angeles Times as ‘Legal Visionaries’ in its second annual Business of Law magazine.
Speaking Engagements
The Role of Trustee, a Blessing or a Burden
Fiduciary Round Table of the San Gabriel Valley
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The Role of Trustee, a Blessing or a Burden
Estate Planning and Trust Council of Long Beach
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When Planning Fails: Estate Pitfalls That Spark Litigation
Orange County Paralegal Association
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The Role of Trustee, a Blessing or a Burden
South Bay Bar Association
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To Contest or Not? Will and Trust Contests 101
CEB CLE Live Webinar
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Preserving the Legacy: Navigating Business Ownership and Estate Succession Complexities
WealthCounsel Annual Symposium
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Handling Ethical Issues in Estate Planning and Probate Practice
HalfMoon Education - California Trust and Estate Practice for Paralegals
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Probate Litigation 101
CEB Webinar
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The Unknown Child: DNA Testing and Estate Planning and Trust Administration
Orange County Estate Planning Council
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Probate 101
LAPA Annual Conference
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Latest News About Mathew
- News
- 2 min read
- Published on
Three RMO LLP attorneys recognized among the nation’s top litigators for excellence in complex trust, estate, and fiduciary litigation RMO LLP is proud to [...]
Three RMO LLP attorneys recognized among the nation’s top litigators for excellence in complex trust, estate, and fiduciary litigation RMO LLP is proud to […]
- News
- 2 min read
- Published on
RMO LLP is proud to announce that Sean D. Muntz, Managing Partner, and Scott E. Rahn, Founding Partner, have been recognized among the Daily [...]
RMO LLP is proud to announce that Sean D. Muntz, Managing Partner, and Scott E. Rahn, Founding Partner, have been recognized among the Daily […]
- News
- 2 min read
- Published on
Eight RMO Attorneys Recognized Across Trusts & Estates, Litigation, and Consumer Law RMO LLP is proud to announce that eight of its attorneys have [...]
Eight RMO Attorneys Recognized Across Trusts & Estates, Litigation, and Consumer Law RMO LLP is proud to announce that eight of its attorneys have […]
- News
- 1 min read
- Published on
RMO LLP is proud to announce that partners Scott Rahn, Sean Muntz, and Mathew Wrenshall have been named to the 2027 Southern California Super [...]
RMO LLP is proud to announce that partners Scott Rahn, Sean Muntz, and Mathew Wrenshall have been named to the 2027 Southern California Super […]
- News
- 1 min read
- Published on
RMO LLP is proud to announce that partners Sean D. Muntz, Mathew M. Wrenshall, and Scott E. Rahn have been recognized by the Los [...]
RMO LLP is proud to announce that partners Sean D. Muntz, Mathew M. Wrenshall, and Scott E. Rahn have been recognized by the Los […]
- News
- 1 min read
- Published on
California and Texas trust and estate litigation law firm RMO LLP is proud to announce that 3 of our partners have been included in [...]
California and Texas trust and estate litigation law firm RMO LLP is proud to announce that 3 of our partners have been included in […]
- News
- 1 min read
- Published on
Sean Muntz, Managing Partner of RMO LLP, has been named an “Orange County Visionary” by the Los Angeles Times. The annual publication recognizes individuals [...]
Sean Muntz, Managing Partner of RMO LLP, has been named an “Orange County Visionary” by the Los Angeles Times. The annual publication recognizes individuals […]
- News
- 1 min read
- Published on
National trust and estate litigation law firm RMO LLP is pleased to announce that 3 of our attorneys have been included in the 2025 [...]
National trust and estate litigation law firm RMO LLP is pleased to announce that 3 of our attorneys have been included in the 2025 […]
- News
- 1 min read
- Published on
Probate litigation law firm RMO LLP announced that Founding Partner Scott Rahn, Managing Partner Sean Muntz, and Pasadena Managing Partner Mathew Wrenshall have been [...]
Probate litigation law firm RMO LLP announced that Founding Partner Scott Rahn, Managing Partner Sean Muntz, and Pasadena Managing Partner Mathew Wrenshall have been […]
- Probate Law
- 2 min read
- Published on
National estate dispute law firm, RMO LLP, announced today its inclusion on the 2024 U.S. News – Best Lawyers® “Best Law Firms” list for [...]
National estate dispute law firm, RMO LLP, announced today its inclusion on the 2024 U.S. News – Best Lawyers® “Best Law Firms” list for […]
- News
- 4 min read
- Published on
Scott Rahn’s passion for the national inheritance dispute law firm he and long-time friend and co-founder Sean Muntz have been quietly building over the [...]
Scott Rahn’s passion for the national inheritance dispute law firm he and long-time friend and co-founder Sean Muntz have been quietly building over the […]
- News
- 2 min read
- Published on
Muntz succeeds founding partner, Scott Rahn, who will serve as firm CEO LOS ANGELES, July 18, 2022 /PRNewswire/ — National probate and inheritance dispute law [...]
Muntz succeeds founding partner, Scott Rahn, who will serve as firm CEO LOS ANGELES, July 18, 2022 /PRNewswire/ — National probate and inheritance dispute law […]
- News
- 2 min read
- Published on
LOS ANGELES, July 19, 2022 /PRNewswire/ — National probate and inheritance dispute law firm, RMO LLP, announced today that CEO Scott Rahn and firm [...]
LOS ANGELES, July 19, 2022 /PRNewswire/ — National probate and inheritance dispute law firm, RMO LLP, announced today that CEO Scott Rahn and firm […]
- News
- 3 min read
- Published on
LOS ANGELES, July 15, 2022 /PRNewswire/ — National probate litigation law firm RMO LLP announced today that Founding Partners Scott Rahn and Sean Muntz [...]
LOS ANGELES, July 15, 2022 /PRNewswire/ — National probate litigation law firm RMO LLP announced today that Founding Partners Scott Rahn and Sean Muntz […]
- News
- 1 min read
- Published on
The plaintiff, represented by RMO LLP, was recorded while showering by employers LOS ANGELES, April 25, 2022 /PRNewswire/ — National probate litigation law firm RMO LLP [...]
The plaintiff, represented by RMO LLP, was recorded while showering by employers LOS ANGELES, April 25, 2022 /PRNewswire/ — National probate litigation law firm RMO LLP […]
- News
- 2 min read
- Published on
LOS ANGELES, Feb. 15, 2022 /PRNewswire/ — Probate litigation law firm RMO LLP announced that Co-Managing Partners Scott Rahn and Sean Muntz have been [...]
LOS ANGELES, Feb. 15, 2022 /PRNewswire/ — Probate litigation law firm RMO LLP announced that Co-Managing Partners Scott Rahn and Sean Muntz have been […]
- News
- 2 min read
- Published on
LOS ANGELES, Sept. 22, 2021 / PRNewswire / — Probate litigation law firm RMO LLP announced today it has secured a $1.1 million trial [...]
LOS ANGELES, Sept. 22, 2021 / PRNewswire / — Probate litigation law firm RMO LLP announced today it has secured a $1.1 million trial […]
- News
- 2 min read
- Published on
LOS ANGELES — (As originally published in BUSINESS WIRE) — Probate and trust estate litigation law firm RMO LLP announced today that Partner and [...]
LOS ANGELES — (As originally published in BUSINESS WIRE) — Probate and trust estate litigation law firm RMO LLP announced today that Partner and […]
- News
- 2 min read
- Published on
LOS ANGELES – May 1, 2019 – Southern California-based law firm RMO LLP announced today that Partner Sean D Muntz, who oversees the firm’s [...]
LOS ANGELES – May 1, 2019 – Southern California-based law firm RMO LLP announced today that Partner Sean D Muntz, who oversees the firm’s […]
- News
- 2 min read
- Published on
LOS ANGELES, March 22, 2018 /PRNewswire/ — Law firm RMO | Rahn Muntz O’Grady LLP has some of the strongest attorneys in Los Angeles [...]
LOS ANGELES, March 22, 2018 /PRNewswire/ — Law firm RMO | Rahn Muntz O’Grady LLP has some of the strongest attorneys in Los Angeles […]
Latest Articles from Sean
Insights and advice on trust and probate estate litigation from our blog.
- Trust Litigation
- 5 min read
- Published on
Yes, trustees can be held personally liable for losses sustained by the trust if they are found to be in breach of their fiduciary [...]
Yes, trustees can be held personally liable for losses sustained by the trust if they are found to be in breach of their fiduciary […]
- Probate Litigation
- 25 min read
- Published on
Key Takeaways Introduction Appellate courts may review court rulings over probate disputes that involve factual mistakes or procedural errors that ultimately may have impacted [...]
Key Takeaways Introduction Appellate courts may review court rulings over probate disputes that involve factual mistakes or procedural errors that ultimately may have impacted […]
- Probate Law
- 5 min read
- Published on
The probate court is a court that handles the administration and distribution of assets to beneficiaries when someone dies, among other matters. If you [...]
The probate court is a court that handles the administration and distribution of assets to beneficiaries when someone dies, among other matters. If you […]
- Probate Law
- 5 min read
- Published on
Probate courts can decide all matters related to an estate, including who inherits what and how it will be divided under state law. However, [...]
Probate courts can decide all matters related to an estate, including who inherits what and how it will be divided under state law. However, […]
- Probate Law
- 6 min read
- Published on
Orange County Superior Court probate notes are received after you’ve filed your Petition for Probate with the OCSC probate division. Probate notes are simply the probate court examiner asking for clarification [...]
Orange County Superior Court probate notes are received after you’ve filed your Petition for Probate with the OCSC probate division. Probate notes are simply the probate court examiner asking for clarification […]
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