Daniel J. Sullivan

Daniel J. Sullivan

(213) 624-6900

Daniel J. Sullivan is a Partner in the Los Angeles office of Manning Kass. He is a member of the Catastrophic Liability Defense, Class Action and Mass Torts Defense, and Special Investigations Unit / Insurance Fraud Litigation teams.

Mr. Sullivan is a member of the Complex Litigation team, which focuses on affirmative litigation cases involving insurance fraud, first and third-party special investigation defense, high exposure and catastrophic personal injury matters, mass torts, transportation litigation, and class action defense. He has extensive litigation experience; including solo counsel in jury trials and arbitrations, taking hundreds of depositions and examinations under oath, retained and non-retained expert examination, and all areas of civil litigation. Mr. Sullivan also has experience in the areas of general civil defense and insurance defense, including automobile liability and coverage, box truck rental liability and coverage, commercial trucking liability, recreation and hospitality services liability, public entity liability, products liability, SIU-fraud, wrongful death, and premises liability including condominium and HOA-related liability and coverage. More than half of Mr. Sullivan’s SIU practice involves assisting client insurers with first-party investigations and arbitration defense, while the balance includes both third-party claims and supporting client’s affirmative litigation

Mr. Sullivan received his Bachelor of Arts in Economics for Business and Management from Occidental College. As an undergraduate, he was a recipient of the Occidental College Scholarship and the Leona H. and Corson W. Ide Scholarship, played NCAA Division III football and intermural rugby, and was a founding member of the Occidental Jazz Ensemble. He received his Juris Doctor from Southwestern University School of Law. During law school, he clerked for the Los Angeles County District Attorney’s Office, where he was a certified law clerk as well as the Los Angeles City Attorney’s Office and the U.S. Small Business Administration. He also served as the chapter clerk for the Phi Alpha Delta Law Fraternity, Sammis Chapter.

Mr. Sullivan is admitted to practice in California and the United States District Court for the Central District of California.


  • California


  • United States District Court for the Central District of California


  • Southwestern University School of Law, Juris Doctor
    • Chapter clerk, Phi Alpha Delta Law Fraternity, Sammis Chapter
  • Occidental College, Bachelor of Arts in Economics for Business and Management
    • Recipient, Occidental College Scholarship
    • Recipient, Leona H. and Corson W. Ide Scholarship