Our Team


Jill Davidson, Psy.D.

Jill Davidson, Psy.D. is owner and director of the Collective Care Clinic. She received her doctorate in clinic psychology from Pacific University in Hillsboro, OR. Prior to her role at Collective Care Clinic, Dr. Davidson founded the Portland Anxiety Clinic, a reputable anxiety and related disorders clinic dedicated to the use of evidence-based psychotherapies. She continues to oversee operations at Portland Anxiety Clinic concurrent to her role at Collective Care Clinic. Dr. Davidson is an expert in the treatment of anxiety and related disorders with a particular emphasis in families and child related presentations of obsessive-compulsive disorder and PANS/PANDAS.

Dr. Davidson has a passion for ensuring that individuals and families in our community receive the best care possible for their mental health concerns. She is specifically enthusiastic about the ethical practice of psychology and psychotherapy. This is exemplified by her position as chair of the ethics committee for the Oregon Psychological Association. Dr. Davidson also sits on the International OCD Foundation’s local affiliate board in Oregon and hosts the board’s meetings regularly. Her vested interest in caring for our community is the sole reason for her investment in the development of Collective Care Clinic.

Chief of Operations

Brandon Markel, Psy.D., MBA

Brandon Markel, Psy.D., MBA is the Chief of Operations at Collective Care Clinic. He received his Doctorate in Clinical Psychology from the Illinois School of Professional Psychology, his Doctoral Certificate in Business Management from Argosy University, his Master’s in Clinical Psychology with a Counseling Specialization from the Chicago School of Professional Psychology, and his Master’s in Business Administration from Cardinal Stritch University. Additionally, he holds diplomate status in both the American Academy of Experts in Traumatic Stress and The Academy of Cognitive Therapy.

Dr. Markel has held leadership positions in several established healthcare systems. He has a proven track record of establishing behavioral health and clinical training programs in medical and clinical settings. Dr. Markel currently oversees clinical operations and shares responsibility of clinical training for masters and doctoral psychology students, social work students, postdoctoral residents, allied health professionals, and psychiatry residents at Collective Care.

Dr. Markel completed his advanced training and postdoctoral residency with two members of the International OCD Foundation’s scientific advisory board. He holds certifications in the assessment and treatment of traumatic stress syndromes: adult and child, body focused repetitive behaviors (BFRBs), tic and Tourette’s disorders, Cognitive Behavioral Therapy, and Interpersonal Psychotherapy. Dr. Markel is published in the area of complex traumatic stress syndromes and has presented to both professional and lay audiences on topics of OCD, BFRBs, traumatic stress syndromes, mindfulness based therapies, management of suicidality, and evidence-based practice. Dr. Markel is a licensed psychologist in Oregon, Washington, Illinois, Wisconsin, and Missouri.

Medical Director

Paul McMahon, M.D.

Originally from Miami, FL, Dr. Paul McMahon received his undergraduate degree in Neuroscience from Colgate University in upstate New York, and then attended medical school at the University of Miami Miller School of Medicine. He began residency training as a neurosurgeon, in the Department of Neurological Surgery at Oregon Health and Science University. Realizing his passion was truly for mental health after three years of surgical and critical care training, he transferred to the Department of Psychiatry at OHSU to complete his training as a psychiatric physician. In addition to his years of medical training, Dr. McMahon has extensive experience with clinical research, and was a dual Doris Duke and National Institute of Mental Health Clinical Research Fellow at the University of Pittsburgh. He has carried out award winning research on the clinical outcomes of concussion and traumatic brain injury, and his publications are currently the most highly cited articles in the Journal of Neurotrauma.

Now, Dr. McMahon is a Board Certified Psychiatrist by the American Board of Psychiatry and Neurology. As a result of this extensive and unique training, Dr. McMahon has unmatched experience in his field. Drawing on his expert knowledge of neuroscience, scientific research, and evidence-based psychiatry, Dr. McMahon is devoted to providing each of his patients with the best evidence-based care possible. Alongside his position as medical director of the CCC, he operates his private practice in Oregon and Florida.

Director of Child and Adolescent Services

Erica Aten, Psy.D.

Dr. Erica Aten holds a Doctoral degree in Clinical Psychology from The Chicago School of Professional Psychology, with an emphasis in child and adolescent psychology. Additionally, Dr. Aten is a nationally registered Health Service Psychologist.

Dr. Aten has trained and worked in a variety of settings, including therapeutic day schools, community mental health centers, residential facilities, and psychiatric hospitals. Dr. Aten has formalized training and experience in treating disruptive behaviors in youth, often related to ADHD, Autism Spectrum Disorder, Disruptive Mood Dysregulation Disorder, Intermittent Explosive Disorder, depression, and anxiety disorders.

Dr. Aten’s specialties and clinical interests include working with children, adolescents, and young adults experiencing anxiety-related disorders, depression, disruptive behaviors, autism spectrum disorder, school refusal, ADHD, trauma, and self-harm. Dr. Aten also has expertise treating LGBTQAI+ youth and young adults and is dedicated to providing affirming therapy for transgender, nonbinary, and gender expansive individuals. Dr. Aten is collaborative and utilizes evidence-based interventions, such as Cognitive-Behavioral Therapy (CBT), Dialectical Behavior Therapy (DBT), Exposure and Response Prevention (ERP), Acceptance and Commitment Therapy (ACT), Collaborative Problem-Solving, and Parent Management Training.

Psychiatric Mental Health Nurse Practitioner

John Benson, PMHNP-BC

Originally from Pittsburgh, Pennsylvania. John Benson, PMHNP-BC received his undergraduate degrees in Nursing, History, and Philosophy from The University of Pittsburgh. He completed his Psychiatric Mental-Health Nurse Practitioner degree at UT Health in Houston, Texas. He is an alumnus of the Psychiatric Nurse Residency program at Menninger Clinic in Houston.

John has an extremely strong interest in evidence-based practice. He spends much of his free time reviewing journal articles and continuing education materials with the goal of providing an optimum treatment experience for his clients. In addition to his work with Collective Care Clinic, he operates a private practice in Texas and Oregon. His hobbies include travel, Brazilian Jiu-Jitsu, weight lifting, watching movies, and spending time with his fiancee and their mischievous seven-pound poodle.

Director of Diversity and Inclusion

Annette Cantu, Ph.D.

Dr. Cantu works collaboratively and compassionately with children, adolescents, families, and young adults. She approaches her work from a strengths-based, humanistic, culturally and identity-affirming stance, with a particular awareness of the complex systems and multiple roles and identities in one’s life. She is particularly adept at balancing real-life application with current scientific findings. Dr. Cantu values transparency and uses her background as a teacher and educator to provide strong psychoeducational, evidence-based interventions, building on a relationship of trust and respect.

Dr. Cantu holds a Doctoral degree in School Psychology from the University of Texas – Austin. She completed her internship at Oregon Health and Science University in pediatric psychology and her postdoctoral residency at the OHSU Harold Schnitzer Diabetes Center. She has extensive training in Cognitive Behavioral Therapies for youth and parent anxiety and related disorders, depression, trauma, as well as in interventions in health psychology (Habit Reversal Training, toileting, adjustment to chronic health conditions, diabetes), ADHD and child behavior concerns (Parent Management Training), and Grief Therapy. Dr. Cantu is also passionate in working with the LGBTQIA+ and gender nonconforming community and can provide letter writing and identity development support for transgender and gender nonconforming youth and their families.

Program Coordinator

Keegan Baurer, MA., QMHP-R

Keegan Baurer is a Qualified Mental Health Professional and Program Coordinator at the Collective Care Clinic. He works with patients in the Intermediate Care Programs. He holds a Master’s Degree in Applied Psychological Sciences from the Pacific University School of Graduate Psychology.

Keegan utilizes Cognitive Behavioral Therapy (CBT) and evidence-based practices to assist clients in creating meaningful change within their lives. His interpersonal style has been described by patients as warm, personable, collaborative, and genuine. His clinical interests include social anxiety, trauma, OCD, and generalized anxiety disorder. Keegan’s approach to therapy is to meet patients where they are at in their change process and provide them with the support needed to live in alignment with their goals and values.

Keegan is a specialist in treating various anxiety disorders via exposure and response prevention. He also has clinical experience in implementing behavioral activation to treat depression and utilizing cognitive processing therapy for the treatment of trauma. Keegan has extensive experience working with adolescent populations in residential treatment settings and is well-versed in behavior modification techniques. Keegan is certified in the treatment of body-focused repetitive behaviors (e.g., hair pulling, skin picking, nail biting, etc.) by the TLC Foundation for Body-Focused Repetitive Behaviors. Keegan is also certified in using Cognitive Therapy to treat a variety of conditions by the Cleveland Center of Cognitive Therapy.

Staff Psychologist

Steffanie La Torre, Psy.D.

Dr. La Torre earned her doctoral degree in Clinical Psychology, with an emphasis in Latinx psychology, from Pacific University School of Graduate Psychology, as well as a master’s in Clinical Psychology from the University of Alaska Anchorage. Having grown up in Quito, Ecuador, Dr. La Torre is a native Spanish speaker and bi-cultural therapist.

Dr. La Torre has trained and worked in a variety of settings providing therapy to adolescents, adults, and older adults for a range of psychological concerns including but not limited to anxiety, depression, posttraumatic stress disorder, and adjustment disorder. She recently completed her doctoral internship at Sharp Healthcare, San Diego’s largest psychiatric hospital providing inpatient and outpatient services to patients across the lifespan. In addition to providing psychotherapy, Dr. La Torre has training in psychological assessment. She utilizes an integrative approach to therapy, pulling from evidence-based interventions such as Cognitive Behavioral Therapy (CBT) and Acceptance & Commitment Therapy (ACT) to create individualized treatment plans that address each patient’s concerns and ultimately reduce emotional suffering.

Dr. La Torre is passionate about providing the best care, in a collaborative, warm, safe, and accepting environment to help patients work towards a life worth living.

Psychologist Resident

Brad Schultz, Psy.D., QMHP-R

Dr. Brad Schultz (he/him) is a Psychologist Resident at Collective Care Clinic. He graduated with a doctoral degree in Clinical Psychology (PsyD) from Pacific University’s School of Graduate Psychology. Brad uses a variety of evidenced based treatment modalities to equitably meet clients’ needs. Primarily, he uses a Cognitive Behavioral Therapy (CBT) framework, seeking to create a relational space exemplified by empathic attunement, curiosity, and introspection. Brad specializes in working with the treatment of OCD and anxiety related disorders, and is also trained in working with depression, trauma, men’s issues and couple’s therapy. Additionally, Brad sits on the International OCD Foundation’s local affiliate board in Oregon.

Brad is passionate about facilitating opportunities for growth, understanding, and new perspectives. His goal is to work with clients in developing coping skills and gaining insight into life’s circumstances. This includes breaking down barriers to help navigate learned patterns, family dynamics, and automatic negative thoughts.

In his spare time, Brad enjoys a variety of outdoor activities (hiking, biking, snow sports), spending time with his golden retriever, and cooking delicious food with his partner.

Psychologist Resident

Leighton Fink, PhD, QMHP-R

Dr. Leighton Fink is a Psychologist Resident at Collective Care Clinic. She holds a Doctoral degree in Clinical Psychology from the California School of Professional Psychology in San Diego, CA, with an emphasis in health psychology.

Dr. Fink has trained and worked with adults in a variety of settings, including outpatient mental health clinics, medical and psychiatric inpatient hospitals, emergency rooms, and outpatient preventative care clinics.  She specializes in treating anxiety and mood disorders, as well as utilizing psychophysiology to treat sleep disorders, gastrointestinal problems, and chronic pain.  Her training also includes treating trauma and stressor-related disorders, bipolar disorder, and providing couples therapy.

Dr. Fink is passionate about providing therapy that is client-centered and strengths-focused, and she believes a warm, genuine, collaborative space is necessary for clients to do their best work.  Dr. Fink utilizes an integrative therapeutic approach grounded in evidence-based treatment modalities of Cognitive-Behavioral Therapy (CBT) and Acceptance and Commitment Therapy (ACT).  She incorporates Schema Therapy, Emotionally Focused Therapy (EFT), and self-compassion as needed to best aid the client in living an authentic, values-driven life.

Psychologist Resident

Sean Aaron, PhD, QMHP-R

Sean Aaron, PhD completed his masters and doctoral degrees in Clinical Psychology at Brigham Young University. Dr. Aaron has worked in various treatment settings providing psychotherapy and psychological assessments. Previous clinical settings include private practice, community mental health settings, a university counseling center, and the Salt Lake City and Portland VA hospitals.

Specific areas of interest include evidence based interventions for the treatment of PTSD, anxiety, depression, and adjustment disorder. Dr. Aaron utilizes a collaborative approach to determine which interventions best suit each person in treatment and draws from evidence-based interventions such as Acceptance and Commitment Therapy (ACT), Exposure Response Prevention (ERP), Cognitive Processing Therapy (CPT), and other Cognitive and Behavioral therapies.

Dr. Aaron is committed to continually pursuing cultural competence and has specific training in couple’s therapy, supporting people with sexual concerns or addictions, LGBTQ+ issues, and religious concerns. Dr. Aaron recently completed his doctoral internship at The Portland VA hospital with a focus on using exposure and cognitive treatments for PTSD.

Staff Therapist

Jocelyn Chavez, MA, QMHP-R

Jocelyn Chavez is a Qualified Mental Health Professional with a Master’s Degree in Applied Psychological Science from Pacific University School of Graduate Psychology. Jocelyn is a Psychologist Associate Resident working towards licensure as a Licensed Psychologist Associate (LPA).

Jocelyn utilizes Cognitive Behavioral Therapy (CBT) in addressing client’s unfulfilled needs and
incongruencies in one’s identity and values to help clients become better connected with the person they want to be and the life they choose to live. Her clinical interests include trauma, depression, and anxiety, with a special focus on diverse populations such as the Latinx/Hispanic and LGBTQIA+
communities. Jocelyn utilizes a warm, person-centered approach with clients to create a safe and supportive space to explore vulnerabilities and afflictions.

Jocelyn incorporates evidence-based practices in her work and has a background in research and presentations in national conferences. Her research has focused on intersectionality of diversity factors as well as creating awareness and mental health resources for disadvantaged communities. Her clinical experience includes working with survivors of domestic violence and intimate partner abuse, Autism Spectrum Disorder in child, adolescent, and adult populations, as well as variations of
depression and anxiety disorders in adults.

Staff Therapist

Preston Turner, MA, QMHP-R

Preston Turner is a Qualified Mental Health Professional at the Collective Care Clinic. He works within the Intermediate Care Programs, including working with patients at the outpatient, intensive-outpatient, and partial hospitalization levels of care. Preston additionally works within the clinic’s adult and adolescent group intensive-outpatient programs. Preston holds a Master’s Degree in Applied Psychological Sciences from the Pacific University School of Graduate Psychology, as well as Bachelor’s Degree from Linfield University with an emphasis in music.

Preston Turner has extensive experience working in residential treatment settings with a variety of symptom presentations in populations spanning the lifespan. His interpersonal style has been described by patients as approachable, humorous, and kind. Preston’s clinical interests include working with adolescents and young adults experiencing anxiety-related disorders and depression. Preston specializes in utilizing Cognitive Behavioral Therapy (CBT) and exposure and response prevention to collaboratively address the barriers in patients’ lives to identifying, promoting, and maintaining valued-based living.

Staff Therapist

Chandler Wingren, MA, QMHP-R

Chandler Wingreen is a Qualified Mental Health Professional with a Master of Arts degree in Applied Psychological Science from Pacific University School of Graduate Psychology. Chandler is working as a Staff Therapist with the Collective Care Clinic while pursuing a Doctor of Psychology in Clinical Psychology with an emphasis in Forensics from Pacific University School of Graduate Psychology.

Chandler has a background in Behaviorism and utilizes CBT and Evidence Based Practices in her clinical work in order to help guide clients towards actionable changes that allow them to live a life in closer proximity to their personal values and goals. Her approach to family therapy follows the Family Systems Model in which she seeks to guide families toward making actionable changes within their current system to address any dysfunction experienced by the family unit. Chandler utilizes warmth, transparency, and a client-centered approach to encourage safety and vulnerability within the therapeutic space.
Chandler has a background in research and has presented at the Regional and National level. She has had clinical experience in the areas of Autism Spectrum Disorder, Trauma, Substance Use, PTSD, Anxiety, Depression, and Crisis Intervention. Her clinical interests are in families, individuals, developmental disabilities, human sexuality, and trauma-informed care.

Staff Therapist

Madeline Lehman, MA, QMHP-R

Madeline is a Staff Therapist at Collective Care Clinic in the Anxiety and Related Disorders and Adolescent Programs. She holds a Bachelor of Science in psychology from Oregon State University and a Master’s in Applied Psychological Science from Pacific University. Madeline completed her master’s internship and advanced training at Collective Care Clinic in the Anxiety and Related Disorders program working primarily with adolescents and adults who had struggled with OCD, depression, PTSD, social anxiety, and related conditions using evidence-based treatments.  Prior to Madeline’s advanced training, she had worked in structured residential settings managing acute crises with vulnerable populations.

Madeline has advanced training in and is dedicated to evidence-based practices. Madeline’s therapeutic approach utilizes the patient’s unique strengths to help move them towards living a value-based life. Her approach is collaborative and empathic; she strives to create a supportive environment when working with individuals and families. Madeline has particular interest and experience in working with individuals and families with diagnoses of OCD, social anxiety disorder, body focused repetitive behaviors (hair pulling and skin picking), depression, and panic disorder. She has particular interest in working with individuals who identify as LGBTQAI+ and BIPOC.

Staff Therapist

Molly Jarvis, MA, QMHP-R

Molly earned her Master’s in Applies Psychological Science from Pacific University in August 2021. She began her school career At Concordia University Ann Arbor and completed her undergraduate degree at Portland State with a bachelor’s in psychology.

Much of her clinical experience expands across the lifespan from skill building with children and teens, to working with individuals going through the justice system. She specializes in treatment with depression, anxiety, OCD.

Molly enjoys working with groups, families, and couples. She utilizes evidenced based practices including Cognitive Behavioral Therapy (CBT), Dialectical Behavior Therapy (DBT), Exposure Response Prevention (ERP), Schema Therapy, and Mindfulness-based practices.

Behavior Specialist/Community Based Skills Trainer

Jodie Boettcher, BA, QMHA-R

Jodie is a Community-Based Skills Trainer at Collective Care Clinic with a Bachelor’s Degree from Oregon State University. Jodie has worked in residential treatment, partial-hospitalization, and intensive outpatient settings with children, adolescents, and adults. She has advanced, specialized training in providing evidence-based care for patients experiencing depression, behavioral concerns, as well as OCD and related anxiety disorders. Jodie is skilled at meeting patients where they are at and engaging them in their treatment plan goals.

Jodie values the role of schools and parents in a child’s treatment plan and associated goals. As such, Jodie regularly consults with her patients’ primary therapist, parents, and school team, as needed.

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