Our Clinical & Support Team

At Center of Excellence, our team is dedicated to our patients success. Call 503.832.0945 or contact us anytime.

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Meet the Team

At Center of Excellence

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Clinical Staff
Gilbert M. Simas, MD, MBA Founder and Director of Medical Services

Dr. Simas is board-certified in Psychiatry and Addiction Psychiatry. He offers compassionate, personalized care for each patient. His special expertise is in the treatment of co-occurring mental health and substance use disorders. Dr. Simas opened the Center of Excellence in 2015 to better meet the tremendous community need. He is experienced in treating opioid use disorder with Suboxone®, and is a pioneering provider of telepsychiatry services.

Please note: Dr. Simas is not taking new patients at this time.

Ginny Weston She/Her, MSN, PMHNP-BC

Ms. Weston is a board-certified lifespan Psychiatric Mental Health Nurse Practitioner specializing in all ages, including children and adolescents, the LGBTQ+ population, and prenatal/postnatal mental healthcare. She began her career as a therapist before becoming a nurse practitioner. She’s based in Ohio and provides telehealth services. She enjoys kayaking, traveling, and rooting for her Buckeyes and Browns.

Damaris Andrade She/Her, MSN, PMHNP-BC

Ms. Andrade specializes in psychiatric assessment and medication management for adults and seniors. She is bilingual and offers a holistic, evidence-based approach. Her interests include ADHD, depression, anxiety, OCD, and bipolar disorder. Outside work, she enjoys crafting with her youngest child.

Bonnie Lambert She/Her, PMHNP-BC

Ms. Lambert is an Oregon native with extensive experience in outpatient and inpatient psychiatry. She brings a background in therapy to her work as a psychiatric nurse practitioner, offering integrated care with therapeutic and medication-based modalities. She treats patients 15 and older. In her free time, she enjoys thrillers and being with her family and pets.

Kyle Anderson He/Him, MSN, PMHNP-BC

Mr. Anderson is a Psychiatric-Mental Health Nurse Practitioner with a background in psychology. He offers supportive psychotherapy in every session and emphasizes collaborative care. He is also experienced in treating opioid use disorder with Suboxone®.

Support Staff
Kerri Harrington She/Her, Director of Operations

Kerri oversees clinic operations with a focus on delivering compassionate, expert care to every patient. Her leadership ensures the clinic grows to meet community mental healthcare needs. She’s committed to equity and creating a non-judgmental environment for all.

Jackie Johnson She/Her, Operations/Billing Supervisor

Jackie ensures patients feel welcome and supported whether scheduling, verifying insurance, or setting up payment plans. She values listening to patients and making them feel comfortable and cared for. Outside work, she enjoys gardening and time with her family.

DeeAnn Aldana She/Her, Certified Medical Assistant

DeeAnn joined Center of Excellence in 2020. She grew up in Seattle and graduated in 2004 as a medical assistant. DeeAnn is passionate about supporting patients in their mental health journey. In her spare time, she enjoys gardening, cooking, and camping with family and friends.