Case Manager: Ella Fishman
Hon. David A. Rosen (Ret.) brings a wealth of legal experience to his role as a mediator and arbitrator at ADR Services, Inc. Throughout his career as a Judge and as a litigator, Judge Rosen has demonstrated an unwavering commitment to upholding justice and promoting effective dispute resolution methods. His deep-rooted understanding of the law, combined with his approachable demeanor and empathetic nature, make him an invaluable asset to those navigating the complex realm of alternative dispute resolution.
Judge Rosen was appointed to the Los Angeles Superior Court in 2015. He began his career on the bench handling a criminal assignment and later transitioned to Family Law, where he served for four years. From 2021 to 2023, Judge Rosen presided over a civil assignment, overseeing a broad spectrum of civil and commercial cases. His expertise spans personal injury claims, products liability, business disputes, real estate matters, and employment lawsuits.
Prior to his appointment to the bench, Judge Rosen spent over 36 years at Rose Klein & Marias LLP in Los Angeles, where he held various roles including Associate, Partner, and eventually Managing Partner. Judge Rosen specialized in civil litigation and represented clients in a wide range of cases, handling trial preparation, trials, and appeals. He has particular depth of experience in Personal Injury, Toxic Exposure, Asbestos, and Employment matters. Among the notable cases he handled, from 1986 to 1996 and again from 2005 to 2009, he served as Liaison Counsel for the Los Angeles County Asbestos Litigation. Additionally, he helped to successfully manage the In re: Coordinated Latex Glove Cases from 1998 to 2003, and the Coordinated San Gabriel Valley Groundwater Litigation from 2003 to 2006. Judge Rosen was serving on the Plaintiffs’ Steering Committee of the NFL Concussion Multi-District Litigation when he was appointed to the bench.
As an attorney, Judge Rosen briefed and argued over twenty cases of various types before the California Courts of Appeal, two cases before the Ninth Circuit Court of Appeals, and four cases before the California Supreme Court.
Judge Rosen previously served on the Executive Committee of the Los Angeles County Bar Association Litigation Section and on the Board of Governors for the American Association for Justice, the Consumer Attorneys of California, and the Consumer Attorneys Association of Los Angeles. He graduated from UCLA in 1978 and received his J.D. cum laude from Loyola Law School in 1981.
Personal Injury: Products Liability, Toxic Tort, Defective Machines, Medical Devices, Drugs, Auto Accidents, Premises Liability, Wrongful Death
Workplace Accidents: Construction Accidents, Dangerous Premises, Defective Products, Toxic Exposures
Professional Liability: Medical Malpractice, Legal Malpractice
Employment: Wrongful Termination, Breach of Contract, Discrimination, Harassment, Wage & Hour, Class Action/PAGA Claims
Family Law: Child Custody, Child Support, Spousal Support, Property Characterization, Evaluation and Division, Parentage, Status, Attorney’s Fees
Business/Commercial: Contracts, Debts, Consumer Remedies
Judge of the Superior Court, County of Los Angeles 2016-2023
Rose, Klein & Marias LLP, Los Angeles 1979-2016
Practice focused on civil litigation, handling trial preparation, trials, and appeals, especially in personal injury, toxic exposure, and employment matters.
“Briefing Witnesses for Deposition or Cross-Examination,” Forum, 2015
“Some Common, and Not So Common, Issues of Admissibility at Trial,” Advocate, 2010
“Use and Abuse of the Sophisticated User Defense,” Advocate, 2009
“Toxic Torts,” Forum, 2005
“Third Party Litigation and Workers’ Compensation,” Forum, 2003
“I thought Judge Rosen was excellent. Very well prepared. Developed an in depth understanding of the case quickly and the personalities involved. Our case was a very difficult one to settle but Judge Rosen did his best to reach an agreement.”
“Judge Rosen brings a great deal of intelligence and gravitas to his mediations. He’s very thoughtful, well-prepared, and he doesn’t get riled up. He takes a very legal and practical approach in a very calm and measured way. He can speak very well with business owners and executives. For a more complex legal issue – or something where you’re dealing with professionals or more intellectual folks – I think he comes off very well for both sides.”
“Judge Rosen is not perceived as somebody that’s for one side or the other. He’s perceived as somebody with integrity. And he worked each side the way an effective mediator should by understanding what’s the medicine, what happened in the incident, what are the expectations of the party, what’s at issue and what can I accomplish here. He gave my client a really good understanding about what could be done and what couldn’t be done. That allowed us to kind of reset our expectations, and I think he did the same thing with the other side. Had we just continued with our original expectations, we probably wouldn’t have settled because we would have been seeking way more than they would have paid.”
“I appreciated Judge Rosen’s willingness to thoughtfully discuss the case’s merits. He engaged with me, he engaged with the other side very specifically about various issues of the case and how he would address them. He didn’t just go back and forth, delivering a message of: ‘Their offer is this. What do you want to do?’ He really would engage on a granular basis on the arguments that were being made and how – if he were on the bench – he would probably be likely to look at it. And that was very helpful.”
“I really appreciated working with Judge Rosen. Very intelligent, and he pushed to resolve our case.”
“Judge Rosen was able to get both sides to agree on a number, overall a positive experience. Would definitely use him again.”
“Judge Rosen is great. Very impressed with his preparation and even temperament.”
“Judge Rosen was an excellent choice for mediation. He was fair, and was well-versed on the case. Judge Rosen held a very productive pre-mediation meeting, and was thoughtful finding solutions on this matter. I look forward to working with David Rosen again.”
“Great experience. Judge Rosen’s professionalism and insight on the case were helpful. Judge Rosen was very nice to my client and clear about what mediation is and the his role in the matter as well. I look forward to working with him again in the future.”
“Judge Rosen is outstanding. I have now used him twice, on two very difficult cases (the first was difficult on liability, the second on causation), and he was able to get the cases to resolution in an amount that both the client and I thought was excellent. He has a great style, relates well to clients, and is very effective with both sides. I recommend him highly.”
