Best's Insurance Professionals and Claims Resource

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Best's Recommended Insurance Adjusters
300 East Bonita Avenue, Suite 4186
San Dimas, California 91773Locate in Google Maps
Telephone: 909-225-5448
Fax: 909-267-9760
About Us
Service Area
California IA License #2K64612
California PI License #187809
Established: 2015

  • Arbitration and Mediation Services
  • Mobile Notary
  • Arson Investigations
  • Ocean Marine
  • Assets Investigations
  • Premises Liability
  • Automobile
  • Process Service
  • Background Investigations
  • Product Liability
  • Business Owners
  • Professional Liability
  • Casualty
  • Property Damage Liability
  • Commercial General Liability
  • Recorded Interviews
  • Construction Defect/Liability
  • Scene Diagram Preparation
  • Entertainment
  • Settlement Negotiations
  • Garage Keepers Liability
  • Skip-Traces
  • Heavy Equipment
  • Sub Rosa/Surveillance
  • Inland Marine
  • Third Party Administration
  • Homeowners
  • Theft Claims
  • Jewelers Block
  • Trial Preparation
  • Litigation Management
  • Workers' Compensation
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About Us
John A. Koerner II ("Jack") began his investigative career as a field rep with Farmers Insurance in August of 1988. By 1992, Mr.Koerner became an independent, moving to one of the best IA firms in CA, which also owned a twin Private Investigation firm, and whose employees were completely autonomous, working from home. As an independent adjuster/private investigator, Mr. Koerner's exposure to a wide diversity of claims and investigative situations grew exponentially over the ensuing years, while always keeping the corporate budget objectives of his clients in mind.

After decades of multi-faceted investigative acumen, repeatedly being asked to handle his employer's clients personally, Mr. Koerner decided it was time to form his own company. In 2015, J. Koerner Investigations was born. Our firm is headed by a seasoned casualty adjuster and private investigator who knows what corporate insurers need to make decisions, we understand claims costs, and we are expert settlement negotiators as well. As investigators, we are frequently contacted to find targets no other firm can find, availing ourselves of resources to which most others do not have access. Send us your next claim and experience the difference a truly experienced, highly-proactive claims investigator will make.
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Service Area
Serving the all thirteen southern counties of California including Imperial, Indio, Kern, Kings, Los Angeles, Orange, Riverside, San Bernardino, San Diego, San Luis Obispo, Santa Barbara, Tulare, and Ventura.
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Personnel Information
John A. Koerner II, President
University of California, Los Angeles, BA in Philosophy, 1988
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