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About me

After working in the Family Support Division of The San Diego County District Attorney's Office, I became an associate at Grace, Neumeyer & Otto, where I represented various insurance companies and major automobile manufacturers including Ford, Mazda, and General Motors.  Thereafter, as Senior Trial Counsel for United Services Automobile Association (USAA), I was responsible for litigating a wide variety of cases through trial. In 2000, I helped form Simpson & Brenner, LLP.  As the managing partner, I represented injured victims in catastrophic injury cases and employment matters, as well as business disputes. 


I am now a full-time neutral at Judicate West, where I mediate cases involving significant personal injuries, wrongful death, insurance, sexual harrassment, elder abuse, employment matters, construction defect claims and complex business disputes.


I live in Carmel Valley with my wife and two children.  In my spare time, I teach and practice Tae Kwon Do (Korean Karate).  I am a fourth-degree black belt and certified instructor.  


Photos and videos

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Practice areas


  1. Mediation: 90%
    23 years
  2. Business: 5%
    29 years
  3. Personal Injury: 5%
    29 years



Hourly ($450/hour)

Payment types:

Check, Credit card

Attorney endorsements

5 total 

Are you an attorney? Endorse this lawyer

  • Daniel Mark Gilleon

    Jon Brenner is a great mediator because he settles case. Period. On certain levels, he will likely know the case better than you do. His competence and charisma is what makes him a superior mediator.


    Daniel Gilleon Personal injury Attorney
    Relationship: Worked together on matter

  • Michael S. Waddington

    I endorse Jonathan. He is a highly skilled attorney that is well respected in the legal community.


    Michael Waddington Military law Attorney
    Relationship: Fellow lawyer in community

Contact info

Mediation Offices of Jonathan A. Brenner

402 W Broadway
Suite 2400
San Diego, CA, 92101


DCActive 198707/10/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Top AttorneyThe Daily Transcript2012
Work experience
TitleCompany nameDuration
MediatorJudicate West2008 - Present
Mediation Panel MemberSan Diego County Superior Court2005 - 2010
Managing PartnerSimpson & Brenner, LLP2000 - 2006
Judge Pro TemSan Diego County Superior Court1991 - 2001
Senior Trial CounselUnited Services Automobile Assn.1990 - 2000
Association namePosition nameDuration
San Diego Inn of CourtPresident1999 - Present
United States Court of Appeals for the District of ColumbiaN/A1991 - Present
United States Supreme CourtN/A1991 - Present
United States Court of Appeals For the Ninth CircuitN/A1987 - Present
United States District Court for the Eastern District of CaliforniaN/A1987 - Present
United States District Court for the Northern District of CaliforniaN/A1987 - Present
United States District Court for the Central District of CaliforniaN/A1987 - Present
United States District Court for the Central District of CaliforniaN/A1987 - Present
United States District Court for the Southern District of CaliforniaN/A1987 - Present
Bar Association of the District of ColumbiaN/A1987 - Present
San Diego County Bar AssociationN/A1986 - Present
Consumer Attorneys of San DiegoN/AN/A
Hon. William B. Enright American Inn of CourtBarrister2006 - 2010
American Bar AssociationN/A1986 - 1995
Legal cases
Case nameOutcome
Moyal v. LanphearAppellate decision interpreting appropriate sanctions relative to fast track.
See all legal cases 
Publication nameTitleDate
San Diego Attorney JournalMediator Profile2013
AdvocateMediating Discovery Disputes2013
Los Angeles Daily JournalMediator Profile2012
School nameMajorDegreeGraduated
American University, Washington College of LawLawJD - Juris Doctor1984
Dickinson CollegeEnglishBA - Bachelor of Arts1981
Speaking engagements
Conference nameTitleDate
Expert commentarySan Diego Mayor Bob Filner2013
Expert commentaryZimmerman Trial2013
Resolving Discovery DisputesDiscovery Disputes2011
Use of Experts at Mediation and ArbitrationMediations & Arbitrations2010
Preparing For and Taking DepositionsDepositions2006