SLO Team

We have assembled an unrivaled team of counselors, therapeutic and administrative professionals. Together, we bring decades of experience in connecting people with real solutions and lasting change. We are more than just clinicians, counselors, and mentors. We are driven by a fundamental belief that change is available to anyone who wants it and is willing to work for it. Our role is to help people find the solutions they seek, by closing the gap between rehab and real life. We share a heartfelt commitment to helping people get free of whatever has been holding them back, so they can live a life they are truly proud of.

Executive Team

Serenna MacLachlan

Chief Executive Officer
Serenna has a double master’s degree in Psychology and Addiction and has been working in the addiction and mental health field for over 15 years. Serenna has worked with every aspect of treatment from administration to clinical services and brings that experience to our staff and patients. Her clinical expertise is in Cognitive Behavioral Therapy (CBT), Trauma-Informed Care (TIC) Dialectical Behavioral Therapy (DBT), Motivational Interviewing (MI) EMDR (Eye Movement Desensitization Reprocessing), and Relapse Prevention. Recently, Serenna took over the role as Chief Executive Officer in November of 2022 and continues to apply best practice standards to the work she does at SLO Recovery Center. Serenna has a deep passion for treating the whole person with individualized care and providing hope for the still suffering.

Tanis Hayden, MA, CADC-III, QMHP

Executive Director
executive director
Tanis was raised with alcoholism within the family and learned about the nature of the disease from an early age. Tanis has always been passionate about helping other people and her own personal journey of recovery solidified her decision to work in the treatment field helping others to find and discover long-lasting recovery for themselves. Tanis completed her undergraduate degree through George Fox and obtained her Bachelor of Science in behavioral studies. Tanis continued her education and received a master’s degree in human services through Warner Pacific University. Tanis is a Certified Alcohol and Drug Counselor (CADCIII) and a Qualified Mental Health Professional through MHACBO with the state of Oregon. Native to Oregon, Tanis has a deep love for the Pacific Northwest and enjoys hiking and skiing. Tanis is also happily married and the mother of two wonderful children.

Medical Team

Merle D. Williamson, M.D.

Medical Director
Prior to working in the field of addiction medicine, Dr. Williamson specialized in anesthesiology for 25 years. His expertise and experience as Chair of Hospital Pharmacy and Therapeutics Committee and Chief of Anesthesia at Kaiser Permanente gives him a unique and important perspective in healing patients who are addicted to prescription drugs. Dr. Williamson was awarded his medical degree from Oregon Health Sciences University. He is a member of the American Society of Addiction Medicine and Oregon Society of Addiction Medicine. He is a Diplomat at the American Board of Addiction Medicine. Dr. Williamson has a broad background in addiction medicine working in a staff physician capacity at Hazelden Treatment Center, and others.

Michael Schwartz, MD, DFASAM, DABPM-ADM

Medical Provider
Dr Mike Schwartz is a licensed MD, initially was board certified in ObGyn and practiced for 20 years. He subsequently sub-specialized in Addiction Medicine and Mental Health, and earned board certification by both the American Board of Addiction Medicine and the American Board of Preventive Medicine in Addiction Medicine. He has years of experience leading multiple residential and outpatient treatment programs as medical director. He has also served as an independent consultant of healthcare professionals for multiple state boards and hospitals. He is dedicated to helping those who struggle with substance and mental health issues.

Micah Duvall, DNP, FNP

Medical Provider
Micah is a highly skilled and dedicated nurse practitioner with extensive experience in various healthcare settings, including primary care, emergency room, neurological disorders, cervical and lumbar spine conditions, and addiction treatment. Her passion for patient care and commitment to improving health outcomes have made her an asset in the medical field. Micah discovered her passion for medicine at a young age and pursued her education diligently. She completed her Bachelor of Science in Nursing (BSN), a Master of Nursing Science, and a Doctorate Nurse Practitioner, where she excelled academically and gained hands-on experience through clinical rotations in different specialties. With a specialization in family medicine, which equipped her with the knowledge and skills necessary to diagnose and treat a wide range of health conditions.

SUD Team

Sean Nelson, CADC-II, QMHA

Clinical Director & Director of Operations
Sean started his counseling career teaching Recovery Yoga in 2016 in various treatment centers before beginning counseling with Sober Living Oregon Recovery Center upon its opening in 2018. Throughout his career Sean has emphasized a holistic approach to recovery, uniting all aspects of body and mind. Clinically, Sean champions MI and patient-centered care, emphasizing the transformative power of love, empathy, collaboration, and understanding. Sean progressed to become SLO's Clinical Director and Director of Operations while also still remaining the SLO Recovery Yoga Instructor, carefully guiding and encouraging those seeking a deeper understanding of themselves and a life of abiding wellness.

Stephanie Hanna, CADC-II

Clinical Supervisor
Stephanie has been in the recovery field since 2016 and has a passion for overall health and wellness. She is committed to helping others recognize their worth and unconditional value. She believes in meeting people where they are. "I'll never be in front of you pulling you, or behind you pushing you. I will always walk right beside you." Being active in the recovery community is important to Stephanie because she believes that you truly have nothing if you do not give it away. Finding health and wellness brought Stephanie deeper into her own recovery. She loves spending time with her family, dogs, and her gym community.

Amie Gigliotti, CADC II, QMHA-R

Substance Abuse Counselor
Amie moved to Portland from Reno, Nevada in October of 2023 to continue her career as a CADC at SLO Recovery Center. Amie is currently finishing her Master’s in Clinical Mental Health Counseling at Capella University. Amie strives to cultivate a space of openness and compassion for her clients and colleagues to grow and thrive. Amie’s mantra of purpose is “To know even one life breathed easier because you lived. This is to have succeeded.”

Ginger Jones, CADC-I, QMHA-R, CRM

Counselor & Recovery Mentor
Ginger is new to the recovery profession and comes to us with a business background. She joined SLO in June of 2023. Ginger got her AGS, AAOT and her CADC Certificate from CCC. She is a CADC-R, QMHA-R and CRM. Ginger is living her best life in recovery and excited to share her experience with others. Ginger has a daughter in high school and a son in college that she adores. When Ginger is not working she enjoys anything outdoors, cooking and travel.

Joshua MacDannell, CADC-R, CRM

Substance Abuse Counselor
Joshua came to Sober Living Oregon Recovery Center as a Certified recovery mentor and CADC-R. Joshua is empathetic and compassionate with a passion for helping others grow. Josh hopes to have a long career in the field of addiction. Joshua's motto is, "Begin every day as if it were on purpose." Joshua enjoys spending quality time with his family, and friends.

Lisa Vesley, CDAC-1, CRM

Lead Mentor & Counselor
Lisa is a Certified Recovery Mentor and CADC-I who has graduated from PCC with an Associate of Applied Science in Addiction Studies. She has been in recovery since 2017 and comes to SLO with a passion for sobriety and the spiritual connection that is made possible with a clear mind and heart. Lisa is driven to emphasize the importance of compassion in daily life, encouraging others to find their strengths and their own unique voice. Lisa is a published poet and enjoys sharing poetry with all who will listen.

Michael Horsburgh, CDAC-R, CRM

Certified Recovery Mentor
Mikey is a Certified Recovery Mentor through MHACBO. Mikey has recently completed his application for his PSS (Peer Support Specialist). Being a child growing up in a disorganized environment Mikey understands how loss of control and different relationship dynamics play into the addictive disease. Mikey brings to the field his knowledge of navigating the complex medical and court systems. “I’ve always had a knack for creating a safe place in this world for others and through this comfort I’ve managed to grow hope in some of the darkest moments for myself and others.” In his free time, Mikey enjoys hiking, canoeing, spending time with his dog and enjoying the PNW.

Mental Health Team


Mental Health Director
Pam is a Clinical Social Work Associate and Certified Alcohol and Drug Counselor. Pam became SLO’s Mental Health Clinical Director in December of 2020. Pam has a Master of Social Work from Portland State University and is trained in Eye Movement Desensitization and Reprocessing (EMDR). Pam is committed to treating each patient with unconditional positive regard, and meeting patients where they are at. Pam’s approach is trauma-informed, and she works with a wide variety of patients who wish to heal from their difficult pasts. Before coming to SLO as a therapist, Pam developed a passion for working with patients suffering from substance use disorders and trained as a Certified Recovery Mentor to support patients with similar life experiences as her own. Pam enjoys cooking, exercising, and walking her sheltie, Beatrice.

Caitlin Crowley, MSW, CADC-R, CSWA & Eating Disorder Certificate

Mental Health Therapist & Supervisor
Caitlin has a Master of Social Work with a certificate in Mental Health Practice from Simmons University, as well as her Eating Disorder Certificate from Lewis and Clark College. Caitlin's approach is influenced by concepts in Cognitive Behavioral Therapy (CBT), Acceptance and Commitment Therapy (ACT), and most recently Radically Open DBT (RO-DBT). Caitlin runs several mental health groups at SLO, including the Acceptance and Commitment Therapy Group and the Body Image/Self Image Group, and created the curriculum for SLO's PTSD Group. Caitlin enjoys hiking and reading and believes in the healing power of humor.

Zachary Alexander, QMHA-R, CADC-R

Social Work Intern
Zach moved to Portland in June of 2023 and began with SLO as a mental health intern in September of the same year. Zach is in the process of finishing his Master’s of Social Work degree from the University of Montana, and plans to become a licensed mental health therapist in the state of Oregon upon completion. Zach believes mental health therapy starts first with care and concern, and works hard to provide a trauma-informed therapy experience of unwavering support for all patients of SLO Recovery Center.

Telehealth Team

Rebecca Evans, MS, MAC, CADC III, QMHPC

Telehealth Clinical Program Director
Rebecca holds a Master’s Degree in Psychology, A Masters in Addiction Counseling (MAC), CADC III and a QMHPC. Rebecca Evans is a dedicated advocate, and leader committed to fostering positive change in the realm of Mental Health empowerment. Rebecca has devoted her career to equipping individuals with the tools and knowledge they need to thrive in an ever-changing world. Rebecca believes that every individual deserves the opportunity to receive quality treatment regardless of their circumstances. Through Telehealth work, Rebecca strives to break down barriers and create pathways for everyone to access Substance Abuse and Mental Health treatment. Rebecca has worked In the field of Substance Abuse and Mental Health since 2007 and Telehealth since 2019 to help people sustain sobriety and mental health stabilization. Rebecca is passionate about empowering others to reach their full potential.

Cynthia Gonzalez, CADC II, QMHA-I

Telehealth Counselor
Cynthia Gonzalez is a dedicated professional who has earned her certified alcohol and drug counselor II and qualified mental health associate I through MHACBO in Portland, Oregon. With over 10 years of experience, Cynthia is passionate about making a difference in the lives of those struggling with addiction and mental health issues. In her free time, she enjoys spending time with her kids, exploring her creativity through writing and painting, and constantly seeking out new learning opportunities.

Athena Wildenborg, CADC-R

Telehealth Counselor
As a certified addiction and drug counselor (CADCR-R) and dedicated Telehealth Counselor, Athena brings knowledge and a deep understanding of the complexities of addiction both personally and professionally. Her strengths in Motivational Interviewing (MI), Cognitive Behavioral Health (CBT), and Relapse prevention combined with personal experiences in recovery allows Athena to tailor her approach to each individuals needs while fostering an environment of growth, self-discovery, and sustainable recovery. This unique aspect of what she practices not only enhances the therapeutic relationship but also reinforces the message that recovery is possible, and a new, amazing life awaits on the other side of addiction. “My mission is to guide individuals through their journey to recovery and healing, empowering them to unlock their potential and embrace the beauty of a life reclaimed from addiction.” Athena enjoys scrapbooking and designing picture frames. Athena also loves spending as much time as she can with her kids and 4 grandchildren and has a deep passion for training in the martial art of Jiu Jitsu with hopes to compete in the future.

Ashley Matsumoto, CADC-R, QMHA-R, PSS

Telehealth Counselor
Ashley is a dedicated professional with a passion for helping others on their journey to recovery. With over 6 1/2 years of personal experience in recovery, Ashley has a deep understanding and empathy for individuals struggling with addiction. After completing the addiction program at Portland Community College in 2022, Ashley pursued certifications as a CADC-R (Certified Alcohol and Drug Counselor - Registered), QMHA-R (Qualified Mental Health Associate - Registered), and a peer support specialist. These credentials reflect her commitment to continuous learning and growth in the field of addiction counseling and mental health support.

Admin Team

Cherie Coates

Cherie has been a certified accountant for 25 years. She brings experience and a passion for recovery to the SLO Recovery team. Her positivity and enthusiasm for a better life are contagious throughout the center.

Megan Delucia

Human Resources
Megan is a native Oregonian with an extensive background in accounting and human resources. She brought her skills and enthusiasm to the SLO family to help grow and develop the team. Megan leads an active lifestyle and is passionate about faith, family, and recovery. She is a unique and integral addition to the center, and her work serves both patients and staff alike.

Sarah Epley, CRM

Office Manager
Sarah was born and raised in Oregon. She started her recovery journey in 2018. Sarah is dedicated to making others smile and consistently providing a safe and welcoming space for the patients. Her kindness is infectious, and her willingness to help makes her a valuable addition to the SLO family.

Heather Nelson

Billing Specialist & Support Staff
Heather came to Sober Living Oregon in 2024 with a background in billing, auditing and administration in primary care. She has been in recovery since 2005 and believes that the recovery process is meant to bring the soul back from isolation and into a state of connectedness to all things. She loves plants, yoga, summer, and her cat Valis.

Jaclyn Gassaway

Director of Admissions & Clinical Outreach
Jaclyn moved from Montana to Portland in 2017 to start her life in recovery. She began her career at Sober Living Oregon in 2019 as a Certified Recovery Mentor, worked her way up to be the Billing Manager and has recently been promoted to Director of Admissions and Clinical Outreach. Jaclyn is passionate about helping others to establish and sustain continued recovery from substance abuse and untreated mental health. Jaclyn loves sports, fitness and traveling. She brings recovery experience and a contagious laugh to the patients and staff at SLO Recovery Center.

Melissa Westgate, CADC-R, CRM

Billing Specialist
Melissa’s professional background is in the creative industry, specializing in commercial photography and video. Melissa’s journey in recovery has inspired her to switch to a more fulfilling and purposeful path, bringing her keen business acumen into the recovery world. She has a deep passion for connecting services to people in need. Melissa co-manages housing for Sober Living Oregon where she now provides access to the same supportive environment that helped her build the strong foundation she stands on today.

Patrick Eaton, CADC-R, CRM

Activities & Alumni Coordinator
Patrick’s recovery journey has taken him from coast to coast. Originally from Boston, he is now bringing love and light to Portland. As the activities and alumni coordinator, Patrick is able to bring his deep passion for connectedness, all while making recovery fun. As a strong believer in having a solid foundation in early recovery, Patrick co-manages housing for Sober Living Oregon. Where cultivating a safe and supportive environment is critical for healing and growth.