Home > About Us > Meet the Team

Meet the Team

Our Physicians

Roderick O’Brien, MD

Director of Intensive Treatment Units

Read Bio

Read Bio

Roderick O’Brien, MD

Director of Intensive Treatment Units

Dr. O’Brien is board-certified in psychiatry, addiction medicine, and preventative medicine with over 22 years of experience. He received his medical degree from Indiana University School of Medicine and completed his psychiatry residency there as well. Dr. O’Brien has extensive experience treating adults and adolescents with Electroconvulsive Therapy (ECT) and Transcranial Magnetic Stimulation. Dr. O’Brien joined the medical staff at Centennial Peaks Hospital in 2014. He currently serves as the Director of the ECT program.

Gregory Finnoff, DO

Internal Medicine

Read Bio

Michael Fuller, MD

Chief Medical Officer

Read Bio

Read Bio

Michael Fuller, MD

Chief Medical Officer

Dr. Fuller is a board-certified psychiatrist with over 15 years of experience treating both adults and adolescents. He received his medical degree from the University of South Florida in Tampa and completed his psychiatric residency at Vanderbilt University in Nashville, Tennessee. Dr. Fuller joined the medical staff at Centennial Peaks Hospital in 2013. He became Chief Medical Officer in February of 2023.

Dr. Tycner

Psychiatrist

Read Bio

Read Bio

Dr. Tycner

Psychiatrist

Dr. Tycner is a board-certified psychiatrist with over 30 years of experience treating both adults and adolescents. She received her medical degree from the Academy of Medicine in Gdansk, Poland and completed her psychiatry residency at the University of Texas in Galveston. Dr. Tycner has an extensive work history treating patients in both an outpatient and inpatient setting including Colorado’s Mental Health Institute in Pueblo. Dr. Tycner joined the medical staff at Centennial Peaks Hospital in 2020.

Alexandria Selenke, PMHNP

Nurse Practitioner

Read Bio

Read Bio

Alexandria Selenke, PMHNP

Psychiatric Mental Health Nurse Practitioner

Alexandria is a board-certified Psychiatric Mental Health Nurse Practitioner. She graduated from the University of Colorado in Colorado Springs with her Master’s degree in Nursing. Alexandria initially joined Centennial Peaks Hospital in 2013 and was a Charge Nurse on both the adolescent and chemical dependency units, as well as in the Electroconvulsive Therapy (ECT) department. Alexandria became part of the medical staff at Centennial Peaks Hospital in August of 2022. She currently serves as the provider on the Adult Inpatient Unit.

Michael Chamberlain, MD

Psychiatrist

Read Bio

Read Bio

Michael Chamberlain, MD

Psychiatrist

Dr. Chamberlain received his medical degree from the University of Chicago Pritzker School of Medicine. He completed his psychiatric residency at the University of Colorado in 2023. In that time, Dr. Chamberlain served as the Chief Resident at Denver Health Behavioral Health. Dr. Chamberlain joined the medical staff at Centennial Peaks Hospital in August of 2023. He currently serves as the provider on one of the two Intensive Treatment Units.

Katherine White, PMHNP

Nurse Practitioner

Read Bio

Read Bio

Katherine White, PMHNP

Psychiatric Mental Health Nurse Practitioner

Katherine is a board-certified Psychiatric Mental Health Nurse Practitioner. She graduated with her Doctorate degree in Nursing from Creighton University in 2023. Katherine was a nurse at Wyoming Behavioral Institute for ten years. She was both a Charge Nurse and Nurse Supervisor in that time. Katherine joined the medical staff at Centennial Peaks Hospital in September of 2023. She currently serves as the provider for both the Outpatient Partial Hospitalization Program and Inpatient Adolescent Unit.

Haley Chytka, PMHNP

Nurse Practitioner

Read Bio

Read Bio

Haley Chyyka, PMHNP

Psychiatric Mental Health Nurse Practitioner

Haley is a board-certified Psychiatric Mental Health Nurse Practitioner. She graduated with her master’s degree in nursing from the University of Colorado in 2024. Haley has several years of experience working as a nurse in the Psychiatric Emergency Department at Denver Health Medical Center. She also worked in the Electroconvulsive Therapy (ECT) department at Centennial Peaks while completing her clinical hours for graduate school. Haley joined the medical staff at Centennial Peaks Hospital in March of 2025. She currently serves as the provider on the Detox Unit.

Our Leadership Team

Scott Snodgrass, CEO

Chief Executive Officer

Read Bio

Read Bio

Scott Snodgrass

Chief Executive Officer

Scott is an accomplished leader with over 20 years of experience in the behavioral health care field. He has extensive experience in business development, strategic planning, program development, operations, and leadership. Scott emphasizes a positive work environment, providing compassionate, patient-centered care, and developing strong community partnerships.

Jose Maglione

CFO

Read Bio

Elyse Marinelli

COO/Director of Risk

Read Bio

Read Bio

Elyse Marinelli, LCSW

Director of Risk Management

Elyse Marinelli received her Master of Social Work degree from Colorado State University and is an LCSW in the state of Colorado. She joined Centennial Peaks Hospital in 2017 as a social worker on the adolescent unit. She was promoted to Social Work Coordinator before transitioning into the role of Director of Risk Management and Performance Improvement in 2020. Elyse has 7 years of clinical experience in residential treatment and hospitals working with children, adolescents, adults, and families. She is trained in Trauma-Informed Care which enables her to assist in individualized treatment. This enables her to ensure that patients are on appropriate precautions during their treatment to maximize safety and ensure each patient has a therapeutic environment.