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ABout us

A Little more about tom

Prior to starting Landmark Investigations, Tom was the lead investigator for a third-party administrator (TPA) that adjusted and investigated insurance claims on behalf of insurance carriers.  He worked in the Special Investigations Unit (SIU) and handled commercial general liability insurance claims related to on-premise accidents such as shootings, stabbings, assault and battery, accidental injury, slip and falls, and fires.  He also investigated transportation accidents such as, motorcycle accidents, semi-truck accidents, train accidents, and pedestrian accidents.  The third category of claims he investigated was product liability, construction defect, and error and omission  cases. Over the course of his career, Tom has successfully handled thousands of investigations.  Most of the investigations he handles involves serious bodily injury, a fatality, or significant property damage resulting in a multi-million dollar losses.

As a result, Tom is an expert in all aspects of the claims handling process including insured interviews, claimant interviews, witness interviews, scene investigations, surveillance, obtaining and analyzing medical records, obtaining and analyzing court records, and writing detailed reports.  Tom is also a skilled negotiator and is an expert in closing claims in a timely and cost-effective manner, saving his clients millions of dollars over the course of his 15 year investigative career.  Tom has an open, calm, relaxed demeanor which is helpful in obtaining information from eye-witnesses and other involved parties.  He educates involved parties about the claims process along the way, and holds their hand through each step, so they feel comfortable from start to finish.  Tom is a professional independent insurance adjuster and private investigator, and he strictly adheres to the California Fair Claims Settlement Practices and Regulations.

Tom prides himself on his responsiveness and being available at all times to answer phone calls and emails in a timely manner.  Tom was born and raised in Los Angeles, so he knows the southern California area better than anyone else.  He has also traveled around the world several times, so he is comfortable dealing with people from different cultures and backgrounds and putting them at ease.  Tom also earned his MBA, with a concentration in Finance from Pepperdine University’s highly prestigious Graziadio School of Business and Management. Tom frequently works as a finance consultant with companies to analyze their financial records to increase profits, reduce expenses, and generate meaningful reports that help companies focus on what matters most. Tom also uses his financial investigation and forensic accounting skills to uncover fraud and other financial crimes like embezzlement and employee theft. Tom uses his experience and personal relationships to get superior results for his clients. He is a talented and hard working investigator who is dedicated to exceeding his client’s expectations.

My Professional Qualifications

I am uniquely qualified to handle your most important investigations and get results when it matters most.

Licensed Private InvestigatOR

licensed independent Insurance ADJUSTER



president of landmark investigations

Thomas C. Graybill, MBA


Licensed private investigator specializing in surveillance, undercover operations, and background checks.


Licensed independent insurance adjuster specializing in witness interviews, information gathering and scene investigations.



Registered Process Server specializing in difficult serves.


Expert in financial investigaitons.


Master of Business Administration Degree, Emphasis: Finance.

Why Choose Our Firm

We are an experienced, full-service detective agency specializing in private investigations, financial investigations and insurance investigations.  We are a dedicated to helping our clients get information and win their case.

LICENSED private investigators

We are licensed private investigators. We specialize in surveillance, background checks, and undercover operations.

LICENSED Independent insurance adjusters

We are licensed independent insurance adjusters. We specialize in witness interviews, scene investigations, and intelligence gathering.

registered process servers

We are registered process servers. We specialize in situations where the defendant or witness is evading service.

EXPERIENCED forensic accountantS

Tom has his MBA with an emphasis in Finance from Pepperdine University. He is an expert in forensic accounting and financial analysis.

15+ Years of investigative experience

We have over 15 years of experience investigating insurance claims, financial discrepancies, and domestic issues such as marital infidelity and child custody.

Excellent customer service

We go above and beyond for our clients. We pride ourselves on being available 24/7 to help our clients and our commitment to quality.

Our Coverage Area

Our main office is in Huntington Beach.  We provide service to all of southern California and beyond.

Los Angeles

  • Santa Monica
  • Glendale
  • Santa Clarita
  • Beverly Hills
  • Palos Verdes
  • Calabasas
  • Encino
  • Malibu


  • Huntington Beach (Main Office)
  • Newport Beach
  • Santa Ana
  • Irvine
  • Garden Grove
  • Anaheim
  • Costa Mesa
  • Fullerton


  • La Jolla
  • Point Loma
  • Rancho Santa Fe
  • Oceanside
  • Imperial Beach
  • Chula Vista
  • Poway
  • El Cajon


  • Riverside
  • San Bernardino
  • Corona
  • Canyon Lake
  • Rancho Mirage
  • Temecula
  • Indian Wells
  • Palm Springs


  • Thousand Oaks
  • Santa Paula
  • Simi Valley
  • Camarillo
  • Moorpark
  • Oxnard
  • Fillmore
  • Oak Park

Contact Us

Call today to schedule your free consultation.



419 Main Street, Suite 215

Huntington Beach, CA 92648

© 2019 Landmark Investigations. All Rights Reserved.

License PI #188037 / IA #2L04957 / RPS #OC4094

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