Leadership and Governance

Andy Mendenhall, M.D., D.A.B.P.M., D.A.B.F.M., F.A.S.A.M.

As President and CEO, Dr. Andy Mendenhall oversees all aspects of CCC.

Andy joined CCC in 2017 as Senior Medical Director for Substance Use Disorder Services (SUDS) and became Chief Medical Officer (CMO) in 2018. During his tenure, Andy has elevated and diversified CCC’s service level to offer a broad array of evidence-based practices to match client needs. As CMO, Andy brought oversight and responsibility for the agency’s medical and clinical services, provided leadership to staff, helped set the agency’s strategic direction, promoted ethical and quality care and led CCC through the COVID-19 pandemic. He became President and CEO in July 2022.

Andy is Board Certified in Addiction Medicine and Family Medicine. He graduated from the University of Portland and trained as a medical student and resident family physician at OHSU. He worked at Providence Health Systems and CleanSlate Centers, and co-founded an outpatient integrated treatment program called HealthWorks NW, which was acquired by Hazelden Betty Ford in 2012. Andy’s heart has always been anchored in service work to the most vulnerable and simultaneously resilient members of the Portland metropolitan region.

Andy’s favorite part of his role at CCC is supporting leaders to center, evolve and scale our services to best support the needs of the clients.

Peter Beyer, M.B.A., C.P.A.

Peter joined CCC in 2021 and brings extensive business experience including government and nonprofit management. Since 2013, Peter served as the Chief Financial Officer (CFO) for Home Forward, the largest provider of affordable housing in Oregon. In 2020, Peter was recognized as a CFO of the Year Honoree by the Portland Business Journal. Though he has wide experience in a range of strategic and financial functions for multiple industries, the bulk of his career has been in the service sector. Prior to working at Home Forward, Peter was Controller for Thresholds, Illinois’ largest non-profit mental health provider.

Peter is the Board President of Janus Youth Programs and Treasurer of Housing with Services LLC. He holds an Master of Business Administration from Northwestern University’s Kellogg School of Management, a Bachelor of Science in Accountancy from DePaul University and passed the Illinois CPA exam. He is also an adjunct professor at Portland State University’s School of Business and a member of the Oregon CPA society.

Peter is a big believer in combining employment, health care, and housing resources to improve lives. He is motivated to help CCC maintain a strong financial position in support of that cause.

David Chen, J.D.

David Chen joined CCC as General Counsel in 2021.

David began his legal career in civil litigation representing employees and citizens in employment discrimination and police misconduct claims. After moving into a role as corporate counsel for an international not-for-profit organization, David designed and implemented the organization’s compliance and ethics program, which covered more than 2,000 employees across 27 countries.

David’s work has spanned health care, education, technology and data analytics. He also teaches in the Masters of Legal Studies program at Seattle University School of Law, specializing in courses related to compliance, risk management, and organizational investigations. He is passionate about social justice and serves on several nonprofit boards. He volunteers his time with several free and low-barrier legal clinics and serves as pro-bono counsel to several nonprofits. He received his Juris Doctor from Seattle University School of Law.

Tara Kirk

Tara Kirk joined CCC as Chief Health Services Officer (CHSO) in 2025, bringing over two decades of experience in Federally Qualified Health Center operations. Most recently, she served as the Chief Operations Officer at La Clinica in Medford, Oregon, where she oversaw the full scope of day-to-day operations, including clinical services, support functions, and their community-based care programs.

At CCC, Tara leads Health Services Operations, working in partnership with the clinical and operations leadership teams, to deliver integrated, patient-centered care and support the growth of CCC’s clinical programs. Her work centers on aligning services with CCC’s “Housing is Health” approach. Tara holds a Bachelor of Science in Business Health Care Management from Western Governors University and several professional certifications.

Tara is inspired by CCC’s compassionate model of care and brings a passion for leadership development, having co-developed La Clinica’s Leadership Academy.

Amanda Risser, M.D., M.P.H.

Prior to becoming Chief Medical Officer, Amanda joined CCC in 2019 as the Senior Medical Director for Substance Use Disorder Services (SUDS). She also served as the Senior Medical Director for Primary Care from 2023 to 2025. In those roles, she supported folks in residential treatment services at Letty Owings Center and Hooper Detox. She was instrumental in expanding medication assisted treatment for folks with opioid use disorders.

Amanda is triple boarded in Family Medicine, Addiction Medicine, and Preventive Medicine with 20 years of clinical experience. She attended University of California at Berkeley and then Stanford University School of Medicine before coming to Portland for post graduate training in Family Medicine and Preventive Medicine at OHSU and earning a Master’s in Public Health at PSU.

Amanda believes in compassionate, connected, relationship and patient centered care. She is proud of the brilliant and funny care teams who work hard every day in the service of our mission to our community.