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Psychology Fellowship supervisors

Our Team

Sarah Long, PhD

Pediatric Psychology Fellowship Supervisor

Dr. Long is a native of Warren, Ill., and has been employed at Gundersen Health System as a Pediatric Psychologist since 2015. Dr. Long earned her undergraduate degree in Psychology from Valparaiso University in Indiana, and her doctoral degree in Clinical Psychology from Southern Illinois University Carbondale. Dr. Long completed an APA-accredited pre-doctoral internship program at Rush University Medical Center in Chicago before completing a two year post-doctoral fellowship in Pediatric Psychology at Marshfield Clinic. Dr. Long serves as the primary provider seeing referrals from Gundersen Pediatric GI, Pediatric Hematology/Oncology, and Pediatric Weight Management Clinics. She also heads the inpatient Consultation/Liaison service, seeing patients on the Pediatric Unit, PICU, and NICU. 

Bryan Kolberg, PsyD

Director, Adult Health and Rehabilitation Psychology Fellowship

Dr. Kolberg is a rehabilitation psychologist who staffs the acute rehabilitation unit while also maintaining an outpatient clinic practice. He has been with Gundersen Health System since 2013. He earned his doctorate from The Chicago School of Professional Psychology in Chicago, Ill., and completed his APA-accredited, pre-doctoral internship at The University of Miami/Jackson Memorial Medical Center. He then completed a two-year post-doctoral residency at Rancho Los Amigos National Rehabilitation Center in Downey, Calif. Dr. Kolberg's areas of clinical interest are in neuropsychological evaluation and management of individuals with stroke or cerebrovascular disease, traumatic brain injury, hypoxia and other medical disorders, in addition to psychological evaluation and intervention with individuals with spinal cord injury. 

Afton Koball, PhD, ABPP

Adult Health and Rehabilitation Psychology Supervisor

Dr. Koball is a Rochester, Minn., native who has been with Gundersen Health System (GHS) since 2015. She is a board certified Clinical Health Psychologist and currently serves as the Medical Director of Adult Outpatient Services in Gundersen Behavioral Medicine. Dr. Koball received her Bachelor of Applied Sciences degree from the University of Minnesota-Duluth and PhD from Bowling Green State University in Bowling Green, Ohio. Dr. Koball completed an APA-approved pre-doctoral internship from Rush University Medical Center in Chicago, Ill., and a two year post-doctoral fellowship at Mayo Clinic in Rochester, Minn.  Dr. Koball's clinical and research expertise is primarily in the area of obesity and weight management. She serves as the lead psychologist for the Gundersen Comprehensive Weight Management Program and the Bariatric Surgery Center of Excellence. She also is a member of the Gundersen Eating Disorder Team, and works collaboratively with many medical subspecialty departments in the care and treatment of patients with medical and psychiatric co-morbidities.  

Erin L. Millard, PsyD

Director, Pediatric Psychology Fellowship

Dr. Millard is a native of Menasha, Wis., and has been employed at Gundersen Health System as a Pediatric Psychologist since 2012. Dr. Millard earned her undergraduate degree in Psychology from the University of Wisconsin-Madison and doctoral degree from the Illinois School of Professional Psychology in Schaumburg, Ill. Dr. Millard completed an APA-accredited pre-doctoral internship program at Wright State University, with rotations at Dayton Children's Hospital and Wright State University College Counseling Center. She completed a two year post-doctoral fellowship at Akron Children's Hospital's Neurodevelopmental Science Center. During her time at Gundersen, Dr. Millard has taken a lead role in continuing education, earning the hospital approval for continuing education programming providing CE credit through APA sponsorship. She also co-created a Pediatric Headache Clinic, conducts the majority of IQ/Achievement testing through Gundersen Behavioral Health, serves as the psychologist on the Cystic Fibrosis team and collaborates with many pediatric medical providers throughout the hospital system. 

Love + Medicine

Every day, Gundersen Health System delivers great medicine plus a little something extra—we call it Love + Medicine.

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