Jill Davidson, Psy.D.
Jill Davidson, Psy.D. is owner of 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 Operating Director
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.
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.
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.
Dr. Steffanie La Torre
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.
Dr. Chris Watson
Dr. Watson has specialized training in the treatment of trauma and anxiety disorders and the behavioral management of chronic diseases such as diabetes, pain, and substance use. Therapy is focused within the bounds of empirically supported integrative approaches; where a patient’s culture, health status, strengths, and present moment identity are collaboratively woven into the treatment process.
Dr. Watson’s foundation in humanistic psychology prioritizes autonomy and self-efficacy, believing the role of a therapist is to support a patient’s internal strivings for self-actualization. Client-centered treatment introduces skills derived from Cognitive Behavioral Therapy (CBT) and Acceptance and Commitment Therapy (ACT).
In addition, Dr. Watson provides comprehensive assessment for cognitive, pre-surgical, and attention deficit and hyperactivity disorder evaluations.
Keegan Baurer, MA., QMHP
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 anhedonic 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.
Sarah Riffel is a doctoral intern. She is a Clinical Psychology Ph.D. candidate at Pacific University, and she holds a Master’s in Psychology from The College at Brockport, State University of New York.
Sarah has experience utilizing Cognitive Behavioral Therapy (CBT) and Acceptance Commitment Therapy (ACT) to help clients address dysfunctional emotions, thoughts, and behaviors to live more adaptive, values-driven lives.
Her approach is warm, empathic, and collaborative. She strives to create an individualized and supportive environment to empower clients to progress toward their goals and increase overall fulfillment.
Sarah’s most recent training has focused on neuropsychological assessment of adults with learning disorders (i.e., ADHD) at the university level, as well as older adults with neurodegenerative conditions (e.g., Alzheimer’s, Parkinson’s, stroke) in the general population.
She is also active in the research community where she publishes and presents at national conferences.
Community Based Skills Trainer / Behavior Specialist
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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