Catherine Ryder
Chief Executive Officer

Catherine Ryder serves as the Chief Executive Officer for Tri-County Mental Health Services (TCMHS) where she has been employed for 28 years. She believes in developing models that align with the principles of healthcare reform and is passionate about ensuring access, bending the cost curve and reducing stigma associated with behavioral health.  She believes integration is critical and that we must develop clinical and fiscal models that are fully sustainable. Catherine is proud to represent an agency noted for its trauma-informed, recovery-based approach to services. TCMHS has been deeply committed to promoting whole health and wellness through collaboration and coordination with other key providers and resources across our communities. 

Catherine is a Licensed Clinical Professional Counselor with a MS in Counselor Education, a Nationally Certified Counselor, and an Approved Clinical Supervisor. She has completed the certificate program in Primary Care Behavioral Health from University of MA and is a graduate of the Hanley Leadership Development program for healthcare leaders in Maine. Catherine currently serves as Board President for the Alliance of Addictions & Mental Health Services, Vice-President for the Board of Mental Health Risk Retention Group and also serves as a Board member for The Daniel Hanley Center for Health Leadership and the Maine Health Access Foundation.  Additionally, she is a member of the Maine Military Leadership Council where she represents behavioral health.


Donald Dufour
Chief Human Resources Officer

Donald Dufour is the Chief Human Resources Officer at Tri-County Mental Health Services and has been employed with the agency for a total of 20+ years. He began working with TCMHS as a Children's Crisis Counselor in 1996 before transitioning to the Human Resources Department as a Human Resources Specialist in 1998.  

Donald was also previously employed by Maine Behavioral Health where he served as a Human Resources Partner and by Aroostook Mental Health Center, (AMHC) where he was employed as a Residential Services Worker.  In addition to being a Veteran of the U.S. Army, Donald holds a B.S. degree in Social Sciences and English from the University of Maine at Fort Kent and a Masters degree in Human Resources Management/Industrial Relations from Saint Francis University in Loretto, PA.


Julie Olum
Chief Financial Officer

Julie Olum joined Tri-County Mental Health Services as the Chief Financial Officer in June 2018.  She oversees the Finance team that is responsible for all accounting and financial functions, including the development and management of budgets, preparation of financial statements, and reporting to TCMHS’s board and the public.

Prior to TCMHS, Julie held the Chief Financial Officer position at Spectrum Generations and has had a financial management career spanning over twenty-five years in several successful non-profits.  She has extensive experience in a wide range of leadership and management positions and is able to bring this valuable financial non-profit experience to TCMHS.  Julie received her BA in Accounting from University of Maine and her MBA from Thomas College.


Colin O'Neill
Chief Clinical Officer

Colin O'Neil, LCSW, is the Chief Clinical Officer at Tri-County Mental Health Services with 25 years of management, planning, and consulting experience in both the public and nonprofit sectors. He is passionate about social services implementation and policy, balancing strategy with data, and resource management.

Colin's most recent experience was serving as the Associate Commissioner for the Maine Department of Corrections. In this role he was responsible for overseeing all field and facility operations, programming and contracts for the juvenile division. Prior to this, he worked as a behavioral health treatment provider and administrator as the Deputy Superintendent of treatment programming at Long Creek Youth Development Center. He has recently completed a fellowship at the John T. Gorman Foundation focused on advanced results-based leadership skills and is eager to bring these skills to bear on work at TCMHS.