Neutral Profile



  • No longer accepting new assignments
  • Based in Los Angeles, available in All of California
  • Mediation Only


In his 40 year legal career, Harrison Sommer, Esq. has successfully litigated hundreds of cases as both a plaintiff and defense attorney. Since 2007, he has dedicated his career to serving as a neutral in personal injury cases, medical malpractice, dental malpractice, elder abuse, products liability, subrogation and catastrophic cases involving long term care needs and wrongful death. With his in depth knowledge and experience, combined with his courteous demeanor, preparedness and warm personality, he has impressed lawyers on both sides with his mediation skills and results. He has twice been recognized as a Top Neutral in California by the Los Angeles Daily Journal. A named partner at a major defense firm said, "I have had considerable experience with Mr. Sommer over the years and have always found him to be extremely well prepared, honest and professional. I believe he ranks among the finest, fairest and most trustworthy attorneys in our business." One prominent plaintiff attorney commented, "Mr. Sommer recently mediated a complicated brain injury case, he quickly understood the complex medical issues and skillfully ran the negotiations which ultimately led to him settling a case that had difficulties for both sides. I would highly recommend him." He is committed to the hard work necessary to resolve cases. He successfully handles hundreds of cases per year.

Practice Areas

Hobbies & Interests

Mr. Sommer likes to spend time with his wife, six children and five grandchildren. He has attended literally hundreds of sports activities. His children have played on the collegiate level and his youngest daughter currently plays PAC -12 Volleyball for Washington State. He also enjoys weight training and an occasional round of golf.



"This was a very emotional and sensitive mater. Mr. Sommer was wonderful."
- Attoeny on a Professional Malpractice Therapist matter

"Mr. Sommer was very knowledgeable and engaging. Harrison was a big reason why the case was able to be settled and we are grateful for all his help."
- Attorney, Los Angeles, CA

"Harrison Is always an excellent choice as a mediator. He is very knowledgeable in many fields, his the approach is fair and balanced and he gets the job done. "
- Attorney on an Elder Abuse Matter

"We were very impressed with Mr. Sommer's approach to the negotiations, and even more impressed with the settlement. We appreciated his preparation, thoroughness, and insights in the hearing. It was a pleasure working with him. "
- Attorney on a Premises Liability case

"I thought that it couldn’t get done today and was amazed at how Harrison moved this one along to settlement! We no longer need to arbitrate."
- Attorney on an Elder Abuse Wrongful Death Matter

"I was very pleased with Harrison Sommer's skills as a mediator today. He connected very well with my client and was able to settle the case very admirably."
- Southern California Attorney

"Harrison Sommer is always great. Thank you."
- Attorney on a personal injury case

Experience Summary

Legal Career

  • Full-Time Mediator/Arbitrator, Judicate West (2007-present)
  • Partner, Berglund Johnson & Sommer, Plaintiff practice, focused on personal injury, medical malpractice, elder/dependent adult abuse, premises liability, catastrophic injury and wrongful death (1984 - 2007)
  • Partner, Sommer and Steele. Defense practice focused on professional negligence, product liability, medical malpractice, motor vehicle accidents and coverage disputes (1980 - 1984)
  • Associate, Hillsinger & Costanzo, Defense practice based on medical malpractice, product liability, governmental entity liability, motor vehicle accidents and insurance coverage issues (1975 - 1980)

Education & Professional Affiliations

  • J.D., Loyola University School of Law (1971 - 1974)
  • B.S., University of Southern California, graduated Cum Laude (1967- 1971)
  • Pepperdine University, School of Law - Straus Institute of Dispute Resolution, Mediation Training (2007)
  • Los Angeles County Bar Association, Member
  • Southern California Mediation Association, Member
  • California Dispute Resolution Council, Member

Achievements & Awards

  • Mr. Sommer was recognized as a Top Neutral in California by the Los Angeles Daily Journal in 2011 and 2013.
  • He was the recipient of the Award for Excellence in Preparation for Trial Practice of the Law by the American Board of Trial Advocates.
  • He has had numerous successful verdicts representing plaintiffs and defendants, including road design cases which led to the installation of effective freeway median barriers statewide.
  • He has tried cases in all jurisdictions and almost every courthouse in Southern California.

Legal Experience

  • Personal Injury
  • Medical Malpractice
  • Dental Malpractice
  • Elder and Dependent Abuse
  • Products Liability
  • Insurance Subrogation

Representative Case Information

Recent Representative Cases



  • Subrogation action by insurer against product manufacturer for fire damage
  • Subrogation action for malfunctioning fire suppression system
  • Subrogation action for sprinkler failure alleging design defect
  • Subrogation action for fire damage and to determine ignition source

Professional Malpractice

Medical Mal Dental

  • Maxillary sinus perforation during tooth extraction
  • Trigeminal nerve injury during dental implant procedure
  • Negligent partial extraction resulting in need for extensive oral surgery
  • Severe facial nerve injuries from root canal
  • Lack of informed consent regarding improper sized dental implants

Medical Malpractice

  • Failure to diagnose and treat necrotic pressure ulcers, displaced fracture and severe malnutrition
  • Multiple failures to respond to call light, patient left on back all day resulting in Stage 4 decubitus ulcersand death from complications
  • Failure to diagnose and treat an incomplete stroke resulting in severe neurological injuries
  • Delayed diagnosis and treatment of brain tumor in minor child resulting in blindness
  • Failure to diagnose and determine cause for severe headaches resulting in extensive facial surgery
  • Wrongful death as a result of failure to diagnose liver cancer visible on scans
  • Negligent performance of spinal surgery by removal of healthy disc material resulting in need for fusion
  • Negligent intravenous infusion resulting in severe chemical burns with necrosis requiring multiple surgeries and grafting
  • Anesthetic death due to repositioning of patient during surgery with dislodgement of breathing tube
  • Partial dental restoration treatment leading to need for full mouth reconstruction


Elder Abuse

  • Elder abuse/neglect regarding failure to recognize and treat dehydration. Overuse of medications combining to result in death
  • Elder abuse/neglect involving a fall which resulted in being caught between objects resulting in strangulation
  • Elder abuse/neglect with disputed cause of scalding type burns
  • Elder abuse/neglect by in home 24/7 care provider with high turnover of different providers with no continuity of care resulting in improper administration of medications
  • RCFE -failure to observe medications lodged in throat resulting in aspiration pneumonia leading to death

Personal Injury

  • Supermarket fall after buffing and waxing
  • Pallet Jack injury while off loading product

PI Auto

  • Two vehicle head on collision over center line. DUI involved
  • Premises case, broken sprinkler head and lighting issues
  • Big rig Semi versus pick up truck, failure to stop at controlled intersection, serious damage and injuries

PI Sexual Assault

  • Sexual assault, negligent supervision and hiring issues

Product Liability

  • Marketing of steroid based product for body builders resulting in glandular injuries
  • Surge protector and dimmer switch causing residence fire
  • Circuit board of treadmill causing fire
  • Unguarded power press causing amputation
  • Failure of hip implant device
  • Broken frame on bicycle causing rider to fall
  • Removal of stabilizing cross bar of ladder

Wrongful Death

  • Wrongful death, multiple vehicle impacts, apportionment issues