Dr. Robert Douglas Preijers began his career in law enforcement in 1987 as a Police Officer and SWAT Tactical Operator for the City of Gardena Police Department in California, eventually serving as a Detective. During this time, he earned an Associate of Arts in Administration of Justice from El Camino Community College (1987) and a Bachelor of Science in Criminal Justice Administration from California State University, Long Beach (1992). For his police service, he was awarded the Medal of Valor in 1997.

In 1997, Dr. Preijers joined the Federal Bureau of Investigation (FBI) as a Special Agent, embarking on a twenty-year career conducting complex criminal and national security investigations. His assignments spanned the Detroit and Los Angeles Field Offices, international U.S. Embassies, the SWAT team, and the Behavioral Analysis Unit, where he assessed persons of interest. Transitioning his focus toward mental health within law enforcement, he concurrently earned a Master of Arts (2013) and a Doctor of Psychology in Clinical Forensic Psychology (2015) from Alliant International University. From 2014 to 2017, he served as a Guest Psychological Assessor for the FBI’s Undercover Safeguard Unit. He retired as a Special Agent in 2017, receiving the United States Attorney’s Law Enforcement Award that same year.

Following his retirement from active FBI duty, Dr. Preijers worked as a Contract Mental Health Specialist for the FBI’s Psychological Services Unit in Washington D.C. from 2017 to 2023. In this role, he played an instrumental part in establishing the Psychological Services Unit and developing the Bureau’s pre-employment and fitness-for-duty psychological evaluation programs. In December 2023, he established his private clinical practice, Preijers Psychological Services, in Irvine, California, specializing in forensic psychological evaluations, threat assessment, and therapy.