Marshall Polygraph Services
11172 Huron Street Unit 19
Northglenn CO  80234

Call Us: 303-920-9182

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Marshall Polygraph Services has been serving the State of Colorado since 2004.  Two of our examiners are retired law enforcement officers with over 40 years combined polygraph examiner experience.

Marshall Polygraph Services is dedicated to providing the highest quality work product as well as to working deligently with  clients, parole officers, probation officers, therapists and other professionals in the field.  We utilize the latest computerized polygraph instrumentation to insure th highest level of validity and reliability.  

Our examiners are approved as "full operating level" with the Colorado Sex Offender Management Board and are listed providers for the State of Colorado, parole, probation and social services agencies.

We specialize in the administration of attorney testing, criminal specific, post-conviction sex offender testing and pre-employment examinations.


Flexible Hours by Appointment Only
  Saturday Appointments Available
We are conveniently located at the corner of 
112th and Huron Streets in Northglenn Colorado

Phone:  303-920-9182
Fax:  303-920-9184
E-mail:  marshallpolygraphservices@hotmail.com
Services Offered

  • Post Conviction Sex Offender
  • Pre-Employment Polygraph Testing
  • Attorney Testing