Our Mission

 Liberty Polygraph is dedicated to providing our clients with the highest quality forensic assessments using the most reliable and accurate instrumentation and testing formats.  Our experience in conducting quality polygraph examinations along with our continuing education in scientifically reliable techniques will provide you with the most accurate results. 




Our Commitment

With over 20 years of public safety experience Kathryn Sims, owner of Liberty Polygraph, is committed to providing each client with professional, reliable, top quality service.  Whether you need verification of an applicant’s past personal and employment history, or you want to prove you are being truthful to a loved one, Kathryn understands the importance in delivering timely and accurate results to insure each client’s needs are met to their satisfaction.

  • For a Free Consultation Call Us @

        (925) 391-8822 

  •     Our Office Hours

       Mon-Fri  9am - 6pm

       By Appointment

       239 Main St. Suite E,

      Pleasanton, CA 94566, USA.


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