meet the team

Wayne Martinsen

Dr. Wayne Martinsen, MD, MSW

Dr. Martinsen is a board-certified psychiatrist working with Dakota Family Services. He provides professional services to youth in the residential programs at Dakota Boys and Girls Ranch and maintains an outpatient practice encompassing a wide age range. Originally from rural North Dakota, Dr. Martinsen received his medical degree from the University of North Dakota and completed residency at the University of North Dakota. He also has a master's degree in Social Work from the University of Nebraska, Omaha.

Meryl Willert

Dr. Meryl Willert, Ph.D.

Dr. Willert is a clinical child/adolescent psychologist who completed his doctoral training at the University of North Dakota and Spokane Mental Health in Washington. He has extensive experience in hospital and residential treatment settings and specializes in psychological testing and treatment of ADHD, mood disorders, anxiety, autistic spectrum disorders and personality issues. Dr. Willert emphasizes a cognitive/behavioral approach to therapy as well as play, art and music/percussion techniques, when indicated.

Katie Nylander

Dr. Katie Nylander

Dr. Katie Nylander is a clinical psychologist who was born and raised in Minnesota. After completing her doctoral training at The Chicago School of Professional Psychology, she returned to practice in the Upper Midwest. Dr. Nylander conducts a wide range of psychological evaluations and provides individual therapy for a variety of conditions, including ADHD, mood disorders, anxiety, and personality issues. Dr. Nylander utilizes client-centered, cognitive-behavioral, and dialectical behavioral approaches to therapy with adolescents and adults.

Tammy Uleberg

Tammy Uleberg, FNP

Tammy Uleberg is a certified Family Nurse Practitioner, who was born and raised in the Minot area. She received a Registered Nurse degree from the University of Mary, Bismarck, N.D., and a Family Nurse Pracitioner Certification (FNP - C) from Clarkson College, Omaha, Neb. In 2009, Tammy received a psychiatric and mental health Master’s Degree from the University of North Dakota, Grand Forks. Prior to working at DFS, she worked inpatient psychiatry for more than 12 years.

Provider Services

  • Psychiatric Services
  • Assessment and Evaluation
  • Psychotherapy
  • Medication Management
  • Psychological Testing


6301 19th Ave NW
Minot, ND 58703



7151 15th St S
Fargo, ND 58104