California's trusted experts in workers' compensation fraud investigation, surveillance, and insurance defense. We deliver the truth — documented, defensible, and on time.
Sierra Valley Investigations is a fully licensed California private investigation firm specializing in workers' compensation fraud. We help employers, insurance carriers, third-party administrators, and defense attorneys uncover fraudulent claims and protect their bottom line.
Every case is handled with the utmost discretion and professionalism. Our investigators combine field-tested experience with modern surveillance technology to produce evidence that holds up in court — and saves our clients thousands.
A full suite of investigative services designed to expose fraud, document the truth, and give your defense team the evidence it needs to win.
Discreet, court-ready video surveillance to document claimant activities. We use the latest technology to capture clear evidence of fraudulent claims while remaining undetected.
Thorough Arising Out of Employment / Course of Employment interviews with claimants, witnesses, and employers — uncovering inconsistencies and the full picture.
Comprehensive review of medical histories and treatment records to identify discrepancies, prior conditions, and questionable provider relationships.
Professionally documented witness statements that strengthen your case file and stand up to scrutiny in court or during depositions.
We identify liable third parties and gather the documentation needed to pursue subrogation, helping you recover costs and reduce overall claim exposure.
Direct collaboration with defense counsel to build airtight cases. From early-stage intake to trial-ready evidence packages, we support your legal strategy end-to-end.
When fraud costs you money, you need an investigator who delivers — not promises.
Fully licensed California private investigators carrying full liability and E&O insurance for your protection.
Every case is handled with absolute confidentiality. Our investigators are experienced, low-profile, and thorough.
Detailed reports, time-stamped video, and chain-of-custody documentation that holds up under cross-examination.
Cases are accepted promptly and updates delivered on schedule. We respect your deadlines and your budget.
Open a new case in minutes — secure, confidential, and reviewed personally.
Start Your Case NowWhether you have a quick question or a complex case, we're here to help. All inquiries are confidential.
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For general inquiries. To open a formal case, please use the case intake form.