Training Faculty

Portland DBT Institute strives for excellence in both clinical and training settings. Our trainings offer a full orientation to DBT, from basics to more advanced courses developed to help DBT-savvy clinicians further hone their skills.  

Our training faculty is led by Dr. Linda Dimeff, PhD, a co-developer of DBT for substance abusers, with more than two decades of work with Dr. Marsha Linehan.  All members of our training team have completed the highest levels of training with Behavioral Tech and Dr. Linehan, and are DBT certified and/or recognized as a DBT Expert in a specialty area, including trauma, eating disorders, substance use, and mental health within correctional facilities.

Our enthusiastic and knowledgeable trainers balance decades of experience with enthusiasm for the latest research. Each training team member has extensive experience applying DBT, supervising others in their application of DBT, and single-handedly rolling out DBT in their unique settings.  

We offer on-site training and consultation, as well as our regularly scheduled programs throughout the year.


Linda Dimeff, PhD

Linda Dimeff, PhD serves Portland DBT Institute, Inc. as Institute Director. Dr. Dimeff previously served as Chief Scientific Officer and Vice President at BTECH Research, Inc., an organization she co-founded with Marsha M. Linehan, PhD to facilitate the training and dissemination of DBT and other evidence-based therapies (EBTs). In addition to her role at Portland DBT Institute, Linda currently serves as the Chief Scientific Officer at Evidence-Based Practice Institute where she develops and evaluates emerging technologies that have the potential to transform training and delivery of EBTs.

Trained, supervised, and mentored by Dr. Linehan, Linda is a DBT expert clinician, consultant, and supervisor with specialty expertise in DBT for Substance Abusers. Linda is the 2011 recipient of the ISITDBT Cindy J. Sanderson Outstanding Educator Award. She is a standing member of the Mental Health Services Research grant review committee for the National Institute of Mental Health and is Adjunct Clinical Faculty at the University of Washington. Linda has received over 20 federal grants to facilitate the dissemination of evidence-based therapies and has published over 50 peer-reviewed publications.

Dialectical Behavior Therapy in Clinical Practice Applications across Disorders and SettingsbasicsShe is the first author of Brief Alcohol Screening and Intervention for College Students (BASICS): A Harm Reduction Approach and the primary editor of Dialectical Behavior Therapy in Clinical Practice: Applications Across Disorders and Settings, now in its second edition. Dr. Dimeff is a Linehan Board of Certification Certified DBT Clinician.

Linda Dimeff’s CV


Andrew White, PhD

Dr. White received his doctorate in clinical psychology from the University of Rhode Island and was a fellow at Harvard Medical School before moving to Oregon, where he is a licensed psychologist. His clinical areas of expertise include adolescent and family treatment, clinical risk management, suicide, and implementation of evidence-based practice. He has extensive research and evaluation experience on both coasts, with specific interests in community-based program evaluation, multilevel modeling, frequent use of psychiatric emergency services, and general evaluation of evidence-based practice. As an advocate of the scientist/practitioner model, he has a strongly held value and passion for the adherent delivery of effective evidence based treatment, especially for individuals who have experienced barriers to accessing mental health services.

At PDBTI he is the Associate Director and works with the management team to set program policy, provides clinical services on the adolescent/family team, oversees research and evaluation services, and provides supervision to psychologist residents and clinical staff.  In addition, he serves as the programs Technology Manager and is responsible for information systems services which facilitate clinical care at PDBTI. DR. White is also a DBT-Linehan Board of Certification Certified Clinician™.

Andrew White’s CV


Claudia Avina, PhD

Dr. Claudia Avina received her doctorate in clinical psychology at the University of Nevada, Reno. She has extensive clinical experience in the provision of empirically-based treatments for ethnic minority patients and their caregivers. She has experience in the service delivery of suicide risk assessment and intervention across multiple settings including outpatient community mental health, inpatient medical units, outpatient medical clinics, and clinical research studies. She has experience in the provision of DBT for adults, teens, and their families. She is the current Director of the Adolescent DBT Treatment Program in a Los Angeles County Department of Mental Health agency that serves a population of primarily minority and financially underserved clients. Additionally, she is a primary clinical supervisor for psychology postdoctoral residents and on multidisciplinary psychiatric clinical teams. Dr. Avina has held project director roles in several clinical research studies aimed to evaluating the effectiveness of treatment for suicidal adolescents and their caregivers. She has co-authored numerous publications in the area of suicidal and self-harming adolescent populations.

Claudia Avina’s CV


Bruce Bates, MA, MFT, DPOII

Bruce Bates has been a licensed Marriage and Family Therapist in the state of California since 2000.  He has worked for the Superior Court in Ventura County as a Divorce Mediator, in residential drug treatment, and in the foster care system.  In 1998, Bruce joined the Los Angeles County Department of Children and Family Services where he worked for two years as a Family Maintenance and Family Reunification case manager.  In 2000, Bruce began work in private practice and joined the Los Angeles County Probation Department as a Treatment and Counselor in one of its 18 juvenile detention facilities. His duties with probation have included organizing and facilitating Multi-Disciplinary Team meetings (MDT), implementing cognitive behavior treatment programs, supervising mental health interns, developing behavior modification programs, and managing high risk/high needs cases.

Bruce has been involved with Mindfulness Based Cognitive Behavioral Therapy for the last ten years and maintains his own daily mindfulness practice. In addition, he has participated in mindfulness retreats with Thich Nhat Hann, intensive DBT trainings with Brad Beach, and Cognitive Behavior trainings with Albert Ellis.  In January of 2017, he joined the implementation team for Los Angeles County’s new juvenile detention facility, Campus Kilpatrick.  The facility represents a new “LA Model” which is based on the principle of compassion and care over custody and control.  Bruce helped to oversee the implementation of the Dialectical Behavior Therapy program within the facility.  He continues to run weekly DBT groups as well as provide consultation to other group facilitators and DBT training for probation staff.

Bruce Bates’ CV


Brad Beach, BA

Brad Beach has worked in the field of Juvenile Justice for over 30 years; first as a line staff, then an administrator and program manager.  Since 2004 Mr. Beach has served as Mental Health Clinical Director at Echo Glen, a model juvenile justice facility near Seattle Washington. At Echo Glen, Brad has overseen a DBT Program noted among the top corrections treatment programs in the nation. In 2006, Echo Glen was named Program of the Year by the National Commission on Correctional Health Care (NCCHC).  In 1997 Echo Glen became the first juvenile justice facility to implement Dialectical Behavior Therapy leading to significant decreases in suicidal and assaultive behaviors within the mental health unit.  Over the years, Mr. Beach has become a national expert on implementing Dialectical Behavior Therapy within juvenile justice and residential settings.  He has conducted trainings throughout the United States, Canada, Norway and Australia.  Mr. Beach has been consulting with and training staff in New York Juvenile Justice Facilities since 2010. He effectively engages both direct service staff and administrators, to successfully promote the broad cultural shifts necessary for implementing and sustaining DBT within large, complicated systems.

Brad Beach’s CV


Jamie Bedics, PhD

Dr. Bedics (he/him/his) received his BA in psychology from Penn State University, MS in clinical psychology from the University of Utah, and PhD in clinical psychology from Fuller Graduate School of Psychology, Pasadena, CA. He completed a clinical internship at the Portland VA Medical Center and completed a two-year post-doctoral fellowship at the DBT Center of Seattle. He had the unique privilege of working closely with the developer of DBT, Dr. Marsha Linehan, as both a clinician and researcher. In collaboration with Dr. Linehan, Dr. Bedics published research on the therapeutic relationship and alliance during DBT. In his full-time position, Dr. Bedics is an Associate Professor at California Lutheran University where he is the Director of the DBT Training Clinic in the Graduate School of Psychology. Dr. Bedics is also a Clinical Instructor at the UCLA David Geffen School of Medicine in the Youth, Stress and Mood Program. In this position he worked as a DBT research therapist on a large, multi-site randomized-controlled trial of DBT for suicidal and self-harming adolescents (Collaborative Adolescent Research on Emotions and Suicide or CARES). He also worked as the lead DBT trainer on a funded research study examining the effectiveness of a stepped-care model for delivering DBT in a large hospital setting (PIs: Clark, Asarnow, Linehan). As a co-investigator on this grant, Dr. Bedics rated DBT Adherence for individual and group DBT sessions. Dr. Bedics is a licensed clinical psychologist in California and is board certified in Behavioral and Cognitive Psychology by the American Board of Professional Psychology (ABPP).

Jamie Bedics’ CV


Christopher Conley, M.S.W., RSW

Christopher Conley is a clinical social worker and is certified through the DBT Linehan Board of Certification as a Certified Clinician™.  He has over 18 years of experience working in a wide range of services including child welfare, emergency psychiatry, outpatient mental health, juvenile justice, and in implementing evidence-based treatments in community services.  He has been providing comprehensive DBT treatment since 2005 with adolescents and adults.  Currently, Christopher volunteers for the DBT Linehan Board of Certification as an adherence coder.  He is experienced in a number of behavioral and cognitive behavioral treatments including Prolonged Exposure (PE) for PTSD, Exposure and Response Prevention (ERP) for OCD, and CBT treatments for mood and anxiety disorders.  He is an approved PE consultant and supervisor with Dr. Edna Foa.  In addition to his clinical work and consultation services, Christopher is an Assistant Clinical Professor (PT) in the Department of Psychiatry and Behavioral Neurosciences at McMaster University where he has supervised psychiatry residents in DBT and taught medical students interviewing skills, applied ethics, and evidence-based practice. He has led many DBT trainings for teams and individuals and is actively involved in funded research studies.

Chris Conley’s CV


Patricia Gieselman, MFT

Patricia (Patty) Gieselman, MFT is the founder and Executive Director of Choices Counseling & Skills Center, a private practice that specializes in Dialectical Behavior Therapy (DBT) located in Sierra Madre, California. She is a DBT-Linehan Board of Certification, Certified Clinician™ and is working towards program certification as well. In addition to offering counseling services, Ms. Gieselman trains mental health professionals as a provider of continuing education courses. Patty’s passion is in providing skills and strategies to children and families before they need them, to inoculate against potential risks and future challenges. Ms. Gieselman was recognized for outstanding community service in 1999 and was awarded the “Woman of Achievement” award by the YWCA for her commitment to children and families.

Patricia Gieselman’s CV


Nancy Gordon, LCSW

Nancy Gordon is a Licensed Clinical Social Worker and Qualified Supervisor who has over 30 of experience working with children, teens, adults and families in hospital, Department of Juvenile Justice (DJJ), residential and Community Mental Health Center outpatient settings. She received her MSW in Boston. She lived and worked in Vermont for 30 years  before being recruited to the Tampa Bay Area in 2005.  For the majority of the last 21 years, Nancy served as Clinical Director to several programs in Vermont and Florida. She has been supervising and training staff and students for over 25 years. Nancy is an accomplished speaker, presenter and trainer locally and nationally on a wide range of clinical topics.

Nancy completed the Intensive Training in Dialectical Behavioral Therapy in 1998, and was the first Linehan Board Certified Clinician in Florida in 2015. She has helped train and implement DBT programs in many settings. She is nationally known for her work in adapting DBT to adolescents and had input into the adaptation of DBT to Adolescents, published by Alec Miller and Jill Rathus. She is a Cognitive Behavioral Therapist who has specialized in treating the most seriously disturbed adolescents and their families on all types of issues, including suicidal and self-harming behaviors, anger and behavioral problems, substance abuse, eating disorders, anxiety and social problems, mood disorders, school problems, ADHD, and parent training using an array of evidence-based therapy models.

In 2010 Nancy founded Tampa Bay Center for Cognitive Behavior Therapy (TBCforCBT) which is a private practice and training center for new therapists, that provides outpatient evidence-based CBT and DBT therapy for adults and adolescents.  She also provides clinical supervision for registered interns and MSW students, as well as agency or community consultations and trainings.  Her mission is to improve the quality of life for individuals and their families by providing access to effective, evidence-based behavioral health treatment.  Her vision is to provide exceptional training, consultation and therapy to clients, therapists and agencies. TBCforCBT offers one of the only fully adherent DBT programs in the Tampa Bay area.

Nancy Gordon’s CV


Amy Kalasunas, LPCC-S, NCC

Amy Kalasunas is a behaviorist with over 18 years’ experience working within adherent treatment models. Intensively trained in Dialectical Behavior Therapy in 2002, Amy has continued her professional development with over 120 hours of continued DBT training, including the areas of Prolonged Exposure Therapy in DBT, Radically Open DBT, Mindfulness, Cognitive Behavior Therapy, DBT supervision models, and consultation team adherence practices. Amy is a DBT-Linehan Board of Certification Certified Clinician™. She has developed, implemented, and evaluated program outcomes on inpatient psychiatric units, partial hospitalization, and intensive outpatient programs. Amy has also established adherent DBT treatment programs for multi-diagnostic clients in outpatient clinics, community-based treatment centers, and private practice models. Amy practices the highest fidelity to effective treatment models through formal supervision to individual clinicians, treatment teams, and organizations seeking consultation on effective treatment practice.

Amy Kalasunas’ CV


Cedar Koons, MSW

mindfulness solutionCedar Koons, MSW, LCSW, is a consultant, teacher, researcher and therapist specializing in mindfulness-based treatments including Dialectical Behavior Therapy (DBT).  Cedar,  certified as a DBT therapist by the Linehan Board of Certification, is a senior trainer and consultant for Behavioral Tech, and a co-founder of Santa Fe DBT, LLC where she was team leader from 1998 – 2016. She has taught and consulted all over the US, in Europe, Australia and Japan. Cedar also teaches mindfulness and is the author of The Mindfulness Solution for Intense Emotions: Take Control of Borderline Personality Disorder with DBT.  She lives in Dixon, New Mexico.

Cedar Koons’ CV


Angela Murray-Gregory

Angela graduated with her Masters in Community Psychology from Sage Graduate School, where she interned as a counselor at an inner-city substance abuse program. After graduate school, she moved to Seattle and started working at the Behavioral Research and Therapy Clinics at the University of Washington as the Lead Clinical Assessor for Dr. Marsha Linehan. Angela worked at BRTC for 12 1/12 years, during which time she was trained, supervised and mentored in DBT by Dr. Linehan,  worked on 8 clinical research grants, and was a research therapist in the training clinic. She trained and supervised undergraduate students, graduate students, post-doctoral students and visiting scholars during her time at the clinic. She also received her Master’s in Social Work at the University of Washington during this time.  Angela has published a chapter in a book; 4 journal publications and presented at the AABT conference. Angela returned to New York State and started working for NYS Office of Children and Family Services as a clinician in a residential program for youth offenders, where she helped develop their DBT program. In addition to her work as a DBT trainer for Portland DBT Institute, Angela is working as a clinician at a partial hospital program in upstate New York, where she developed the DBT curriculum and helps train staff and students at the facility on DBT.  Angela is a LCSW-R through New York State.

In her spare time Angela enjoys the outdoors and has a goal of visiting all the National Parks and to become an Adirondack 46er.

Angela Murray-Gregory’s CV


Ajeng Puspitasari, LP, PhD

Dr. Puspitasari is a clinical psychologist whose work focuses on the implementation of evidence-based psychotherapies (EBPs) for adults with serious mental illness, which include Behavioral Activation (BA), Acceptance and Commitment Therapy (ACT) and Dialectical Behavior Therapy (DBT). Currently, she is a clinical director for partial hospitalization and intensive outpatient programs at Rogers Behavioral Health in Minnesota. She is board certified through the American Board of Professional Psychology (ABPP) with a specialty in Behavioral and Cognitive Psychology. As a scientist practitioner, Dr. Puspitasari’s research focuses on the dissemination and implementation of EBPs in diverse behavioral health settings. She has provided BA training for clinicians both in the United States and internationally.

Ajeng Puspitasari’s CV


Josh Smith, MSW, LMSW

Josh Smith, MSW, LMSW, is a licensed clinical social worker in the State of Michigan. He is the co-owner of the DBT Institute of Michigan as well as a DBT-Linehan Board of Certification Certified Clinician™.  Upon getting his master’s degree in social work in 2002, Josh became an outpatient therapist for Pines Behavioral Health in Coldwater, Michigan. After leaving Pines, Josh went on to lead numerous DBT program development trainings in all levels of care (inpatient, partial/day programs, outpatient, residential and forensic) for both adolescents and adults.

From 2005- 2012, he was a trainer in DBT for PESI, LLC.  During this time, he gave over 300 lectures on DBT all over the United States.  He has provided multiple DBT implementation training projects in a variety of settings including outpatient, inpatient, residential, schools, and forensics.  Josh is currently the lead DBT trainer and consultant for the Department of Community Mental Health Association in the State of Michigan.

Josh is a Clinical Instructor in the School of Social Work and the Department of Psychiatry at Michigan State University where he teaches DBT to MSW students as well as second and third year psychiatry residents.  He currently provides supervision to a number of clinicians in DBT from across the country in a variety of settings.  Josh obtained his undergraduate and graduate degrees from Michigan State University and received his 10-Day Intensive DBT Training by Behavioral Tech in 2004.  From 2012-2014, he received DBT supervision from international DBT expert and author, PDBTI’s Linda Dimeff, PhD.

Josh Smith’s CV


April Sobieralski, PsyD

Dr. April Sobieralski is DBT-Linehan Board of Certification Certified Clinician™. She received her Doctorate in Clinical Psychology from Xavier University in 2012 and is a licensed clinical psychologist. She is the founder of LakeWest DBT Center, an outpatient therapy clinic. Her area of expertise is in adherent Dialectical Behavior Therapy (DBT), and she has been intensively trained by Behavioral Tech, LLC trainers. April has experience using DBT to treat many disorders involving emotion dysregulation and eating disorder symptomology. April specializes in behavioral treatments, in addition to cognitive-behavioral therapy and mindfulness-based cognitive therapy for children, adolescents, and adults with a wide range of social and emotional difficulties. She also uses exposure-based therapies to treat symptoms related to trauma, including having advanced intensive training in the DBT Prolonged Exposure Therapy Protocol for PTSD. April offers supervision, consultation, and training for colleagues seeking continuing education and has provided training for specialization in DBT and DBT workshops for community centers. She has experience developing and managing DBT-informed higher levels of care. April was presented with the Outstanding Early Career Psychologist Award in 2016 from the Cleveland Psychological Association (CPA) and currently volunteers her time on the Board of Trustees of CPA as the President.

April Sobieralski’s CV


Erica Tan, PsyD

Erica Tan, PsyD, received her doctorate in clinical psychology from Regent University. Presently, she is a licensed clinical psychologist in Oregon and is an Adolescent and Family team member at Portland DBT Institute working extensively with at-risk teens who struggle with self-harming behaviors and suicidality. She also specializes in work with LGBTQIAA individuals and their families. As a senior member of the staff at PDBTI, she provides supervision to post-doctoral residents on site.  Dr. Tan has led 2-day trainings and helped to co-lead the 5 day CITI intensive training sponsored by PDBTI.  She also provides consultation to programs and other therapists. Dr. Tan has received intensive and advanced intensive DBT training with BTech in 2011 and 2012, additional 2-day DBT training, and mindfulness retreats. To support her practice as a psychologist who values empirically supported treatments, Dr. Tan recently became a DBT- Linehan Board of Certification Certified Clinician™. Erica is currently supervised by Linda Dimeff, PhD.

Erica Tan’s CV


Charlotte Thomas, LCSW

Charlotte received her master’s degree in Social Science Administration (MSSA) at Case Western Reserve University in Cleveland, OH. She trained with Lucene Wisniewski PhD, FAED and Mark Warren MD, FAED for four years in the evidence-based treatment of eating disorders.  She is a licensed clinical social worker in the state of Oregon with professional interests in treating eating disorders and associated issues including borderline personality disorder, depression and anxiety. She has provided services to  individuals, teens, adults, families, and groups. At Portland DBT Institute, Charlotte is the Program Manager for the Pathways to Mindful Eating (PME) program and provides direct service to clients, supervision to staff, and serves on the management board for the clinic helping to inform general clinic policy. Her unique oversight of the PME program has resulted in the creation of an Intensive Outpatient Program for eating disorders and cross clinic integration of competencies related to treating complex clients presenting with eating disorder behaviors.  In addition, Charlotte trains clinics and individuals nationally on DBT, program development, eating disorders, and evidence-based practice.

Charlotte Thomas’ CV


Iren Valentine, PsyD, MSEd

Dr. Iren Valentine earned a Doctorate in School/Clinical Psychology from Pace University, New York, NY, an APA-accredited program. She also earned her Master’s degree in School/Community Psychology from Pace University and graduated with a Bachelor of Arts in Psychology from Bard College. Dr. Valentine is licensed as a Clinical Psychologist currently working in Virginia. Dr. Valentine has over 20 years of clinical experience and demonstrated success in leading mental health teams in varied clinical settings. She has worked in a wide-range of mental health settings including an: outpatient community mental health center, inpatient psychiatric hospital, psychiatric emergency room, rape crisis program, adolescent day treatment program, and university counseling center. In addition, Dr. Valentine served as the Director of the Division of Juvenile Justice and Opportunities for Youth at the New York State Office of Children and Family Services where her bureau provided leadership in the systemic transformation of the statewide juvenile justice system from a correctional to a therapeutic model of care infused with evidence-based interventions such as Dialectical Behavioral Therapy, trauma-informed interventions, and other practices.  Dr. Valentine is presently part of a private practice in northern Virginia and has extensive experience working with clients of diverse backgrounds and identities as well as supporting organizations in collaborative transformations.

Iren Valentine’s CV