Dr. Marnell graduated with distinction from the University of Nebraska with her Bachelor of Arts in psychology. She earned both a Master of Arts in psychology and a Doctorate of Philosophy in clinical psychology from Texas Tech University. She then went on to complete a predoctoral internship at the University of Texas Health Sciences Center at San Antonio, as well as a post-doctoral fellowship in clinical child and pediatric health psychology at Children’s Health in Dallas, TX. After fellowship, Dr. Marnell worked as a consult/liaison psychologist in the endocrinology, gastroenterology, oncology, pain management, solid organ transplant, and obesity clinics at Children’s Medical Center in Dallas.

Dr. Marnell moved to Amarillo in 2016 and worked at Texas Tech Physicians doing assessment and therapy with children and young adults in the pediatric specialty clinic. Over the last 10 years, she had the opportunity to help hundreds of young people with chronic medical issues like type one diabetes and collaborated with parents, medical teams, teachers, and counselors. During this time in Amarillo, Dr. Marnell became aware of the acute need for psychological testing services in the Texas panhandle. In 2023, she opened her private practice in order to provide psychological testing services for children and adults. Dr. Marnell’s believes in collaborative, personalized, patient-centered care to help people find their direction.

Dr. Marnell has served on the boards of various local non-profits and volunteers at an annual camp for children and teens with type one diabetes. Dr. Marnell grew up in a small town in Nebraska and is married to her husband of 12 years. They have two daughters and a son who are active in soccer, dance, wrestling, and music. In her free time, she enjoys exercising, hiking, reading, watching sports, and spending time with her family and friends. Dr. Marnell is also a talented knitter and crocheter and you may have seen her at local pop ups and craft markets.


Marnell Psychological Services is located inside the beautifully renovated Hope Counseling Center building. Hope Counseling Center is a collective of skilled mental health providers who work independently and treat a wide range of issues.

9525 Business Interstate 40, AMA TX 79124


Your appointment

o Parking is available at the front of the building.
o Dr. Marnell’s office will send you a text message 30 minutes before your appointment with a door code and secure link for virtual check in.
o Enter using the door code and have a seat in the shared waiting room. Click the secure link to check in and Dr. Marnell will be with you shortly.
o Restrooms are located at the end of the hallway behind the black privacy wall.