Polygraph Examiner and Financial Investigator 30+ Years in Law Enforcement

Open and Shut Investigative Services
Open and Shut Investigative Services
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Private Investigative Services

OASIS provides comprehensive and confidential legal, business and personal investigative services 


NJ State Certified Veteran and Small Business 

NJ State Licensed Private Detective


  • Polygraph Examinations
  • Background Checks
  • Litigation Support 
  • Financial Investigations



About Tom Ollen, Founder of OASIS

Formally, a Federal Agent working internationally for over 30 years, former veteran and expert polygraph examiner provides expert services legal, business and personal matters.

Learn more about Tom

Our Process

For your protection and security,  we urge you to use our contact form or call us directly.  We can then discuss your case and give you a free quote.  

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OASIS Investigative Services

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