Marc J. Poster



Marc J. Poster is one of America’s leading appellate lawyers.  For more than four decades, he has litigated hundreds of appeals and writ petitions in state and federal appellate courts nationwide.  Marc’s clients – a broad spectrum of plaintiffs and defendants, appellants, petitioners, respondents and appellees, individuals, companies, insurers, and public entities – come to him again and again because of his proven client-centered approach, his passion to win, his brief-writing skills, and his high reputation in the appellate courts and legal community. 

His appellate successes run the whole gamut of subjects, including torts, contracts, real property, insurance, constitutional law, family law, probate and trusts, professional liability and intellectual property.  Marc also assists trial attorneys with critical motions and litigation strategy, so that if their cases go to appeal, they will be well prepared.

Marc was educated at Stanford University and UCLA School of Law, and served as a Senior Research Attorney for the California Court of Appeal.  Marc is a member and past president of the California Academy of Appellate Lawyers, a Fellow of the American Academy of Appellate Lawyers, and a past chair of various Los Angeles County Bar Association appellate practice committees.  Marc also chaired the Beverly Hills Bar Association’s Amicus Briefs Committee and is a former President of that Association.  Marc lectures and publishes extensively on appellate law and practice.

High-Impact Wins


Dromy v. Assil (Dec. 22, 2015, B259489) 2015 WL 9311777 [nonpublished opinion]

Judgment for Damages and Attorney Fees Upheld, and More Fees Awarded

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Camargo v. John F. Kennedy Memorial Hospital, 2014 Cal.App. Unpub. LEXIS 5946

Judgment for Damages Slashed

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Stoltenberg v. Ampton Investments, Inc. (2013) 215 Cal.App.4th 161

Made New Law

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Rycz v. Superior Court of San Francisco County (2022) 81 Cal.App.5th 824

Made new law on the extent to which courts can consider the availability of remote testimony on a motion to transfer venue based on the location of the witnesse...

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Speaking and Involvement

Preserving Issues for Appellate Review During Trial, MCLE Presentation at the Los Angeles Law Library
You've Got a Friend: Winning Appeals with Effective Amicus Briefs, Southern California Business Litigation Inn of Court
2008 - 2016
Settlement Officer, Volunteer Settlement Program, California Court of Appeal, Second Appellate District
Ethical Issues in Appellate Practice, Defense Research Institute, Appellate Advocacy Seminar
Appellate Advocacy and Gay Divorce, Southern California Business Litigation Inn of Court
Thinking Ahead: Protecting Your Position For Appeal, Beverly Hills Bar Association, Litigation Section
Update From the Appellate Courts, Santa Clarita Bar Association
Amazing Tales of Ninth Circuit Practice, Orange County Bar Association, Appellate Courts Committee
Winning At Any Cost: Ethics In The Appellate Courts, State Bar of California
Federal Appellate Practice, Orange County Bar Association, College of Appellate Advocacy
Ethical Concerns In Handling An Appeal, State Bar of California
Appellate Judicial Attorneys Institute, Ethics Panel, California Center For Judicial Education And Research
Ethics In Appellate Advocacy, Los Angeles County Bar Association, Appellate Courts Committee
Taking an Appeal: Civil, Los Angeles County Bar Association, Continuing Legal Education Convention

Professional Associations

Beverly Hills Bar Association, President (2009 - 2010); Board of Governors (2002 - 2006); Amicus Briefs Committee, Chair (2000 - 2006)
Los Angeles County Bar Association, Appellate Courts Section (1978 - 2022), Chair (1984 - 1985); State Appellate Judicial Evaluation Committee, Chair (1997 - 2001)
American Bar Association, Appellate Advocacy Committee of the Tort Trial and Insurance Practice Section (1988 - Present), Vice Chair (2007 - 2022)
6th Appellate Practice Institute, Faculty Member (1988)
California Academy of Appellate Lawyers(1979 - Present), President (1989 - 1990)
American Academy of Appellate Lawyers, Fellow (1996 - Present)