Rob Diekman

radiekman's picture

Member Since


PCSOT Trained

PCSOT Trained

The American Polygraph Association does not prescreen the biographies of its members.

Biography and Additional Professional Information

For more information, please visit Rob's website at:

Rob graduated with a Bachelor Degree in Human Services from Western Washington University, Bellingham, WA, in 1996. From October 1997 to present, he has maintained employment as a Parole Officer. Rob has years of experience handling various types of investigations, testifying in court and disciplinary hearings, working with attorneys, police, victims, high-risk violent and sex offenders, treatment providers and the general public. Additionally, Rob has 2 years of experience facilitating a cognitive behavioral therapy program known as Moral Reconation Therapy (MRT).

Rob graduated from the Marston Polygraph Academy, which is accredited by the American Polygraph Association. Following graduation, he completed the Post-Conviction Sex Offender Testing (PCSOT) course and is a certified PCSOT examiner.

Rob uses the Stoelting Computerized Polygraph System-PRO; a sophisticated computerized polygraph instrument which records, stores, and analyzes physiological changes using a scoring algorithm. Diekman Polygraph Services is dedicated to providing you the customer, with accurate results, professional reports and the highest level of customer service.

Rob is a member of the American Polygraph Association and the Northwest Polygraph Association.

Diekman Polygraph Services is licensed and insured in the State of Washington.



Phone: (360) 672-0355

Diekman Polygraph Services
Oak Harbor and Everett , WA 98203
Phone: (360) 672-0355
47° 56' 36.4848" N, 122° 13' 4.512" W
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