William F. Kerst


I am a Clinical Neuropsychologist and owner of Green Psychological Services, LLC located in Palmer, Alaska.

In the Air Force, I worked with soldiers afraid to sleep because of nightmares. That's why I helped design a (free) DoD-developed App called Dream EZ.

Now, in addition to neuropsychological assessment, our clinic also offers psychological assessment as well as individual and couples based psychotherapies on a case by case basis. The goal of psychological assessment is really the same as the goal of psychotherapy; to help you better understand yourself, your environment, and the complex interaction of you and your environment.


Website:  www.greenpsychservices.com

Green Psychological Services, LLC
Location:  634 S Bailey St, Suite 106
Palmer, Alaska 99645

Phone:  (907) 707-1336
Fax:  907-707-1337
Email:  drkerst@greenpsychservices.com

Twitter:  @wkerst



Dr. Kerst completed his bachelor’s degree in psychology at Chapman University in Orange, California.  He then went on to commission in the United States Air Force after being selected to the competitive Ph.D. program at the Uniformed Services University of Health Sciences.  This is one of the most unique Ph.D. programs in the country as it is part of the only federal medical school in the country and is the only place where military physicians are trained in military medicine throughout their medical education.  As such, his education at USUHS had a decided military and medical focus as well as a strong emphasis in research skills in addition to traditional clinical training.  While at USUHS he studied neuropsychology in the Clinical Center at the National Institues of Health in Bethesda, Maryland for 2 years and at Johns Hopkins Hospital in Baltimore, Maryland for a year.  He also expanded his psychotherapy skills with the Washington D.C. Metropolitan Police Employee Assistance Program where he conducted therapy and assessment with D.C. police officers, their spouses, and children.

He completed his residency in clinical psychology in Ohio at Wright-Patterson Medical Center with an additional focus on neuropsychology. He then opted for an assignment here in Alaska at Joint Base Elmendorf-Richardson where he practiced neuropsychology as part of the Air Force’s only traumatic brain injury program.  Ultimately, he was chosen as the deputy director of that clinic before honorably completing his military service and moving into private practice and establishing Green Psychological Services, LLC.  He has published peer-reviewed scientific articles as part of his work studying automatic attentional processes with mobile assessment techniques.  He has recently worked with the National Center for Telehealth and Technology in developing a mobile application he designed and originated called Dream EZ, an app to help those with trauma-related posttraumatic stress disorder using imagery rehearsal therapy.

Since opening his private practice this year he has worked closely with several organizations in the Mat-Su Valley and in Alaska as a whole. He is currently trusted by the Wasilla, Palmer, Kotzebue, and Bethel Police Departments to conduct their police officer pre-employment psychological evaluations. He has worked with the Alzheimer’s Resources of Alaska organization to assist in getting their clients evaluated and qualified for necessary Medicaid waivers so that they have greater access to needed services.He has worked closely with most of the primary care physicians in the Valley including Coho Family Medicine, Capstone Family Medicine, Dr. Rudolph’s office in Palmer, The Family Health Clinic in Palmer, Arctic Skye Family Medicine, the Wasilla Medical Clinic, Cottonwood Creek Clinic, and the two neurologists in the Valley at the Alaska Brain Center and Mat-Su Neurology.

GPS in the News

Fight your nightmares for a better nights sleep

Dr. William Kerst speaking with CNN about treating trauma-related nightmares in veterans and his work developing the DoD funded smartphone application to help patients overcome their trauma-related nightmares.

(CNN) – By Sandee LaMotte, CNN (Updated 10:54 PM ET, Thu July 27, 2017)

A bomb rips through the Humvee in the road ahead, sending it flying into the air. The pop of gunfire is everywhere.

The man next to you — your best pal in this godforsaken place — suddenly slumps over. Screams and dense smoke fill the air.

It’s the stuff nightmares are made of, and all too real most nights for many returning veterans.​

“Six to eight months after I got home, the nightmares really started to come in,” said Army Reserve veteran Aaron. “Middle of the night, all of a sudden I’m back in Iraq, full battle mentality, running, chasing people down.”   read more/see video

Skip to toolbar