Meet Your Instructors




Portrait of Ryan Lindsay

Ryan Lindsay, MSW, LCSW
Associate Professor of the Practice & Assistant Dean for Social Work, Brown School

Ryan Lindsay's career has focused on training new and experienced providers in various evidence-based treatments, consulting with organizations on how to implement evidence-based programs, and aiding organizations in program development utilizing evidence-based principles. At the Brown School he chairs, teaches and advises students within the Mental Health concentration in the Master of Social Work program.


Portrait of Julie Mastnak

Julie Mastnak, PhD
Senior Lecturer, Brown School

At the Brown School, Julie Mastnak teaches Cognitive-Behavioral Therapy, Applied Behavior Therapy, Differential Diagnosis, and Cognitive Processing Therapy. Since 2006, she has worked on the Post-Traumatic Stress Disorder Clinical Team at the Veterans Affairs Medical Center in St. Louis, specializing in providing diagnostic assessments and evidence-based, trauma-focused treatment.


Portrait of Megan Keyes

Megan D. Keyes, PhD
Clinical Psychologist, National Center for PTSD, Dissemination and Training Division

Dr. Keyes is a clinical psychologist with expertise in the assessment and evidence-based treatment of PTSD as well as the provision of clinical consultation to mental health providers. She has over twenty years’ experience delivering clinical services to trauma survivors. For the past decade, Megan has also provided expert consultation and training to clinicians learning to implement evidence-based treatment for PTSD.


Karen Loaiza, PhD
Clinical Psychologist, Department of Veteran’s Affairs

Dr. Loaiza’s expertise lies in clinical practice with an emphasis on providing quality, evidence-based care predominantly to the veteran population. She has significant knowledge in the assessment and treatment of those dually diagnosed with trauma and substance use disorders. Karen has specialized training in the treatment modalities of Prolonged Exposure, Cognitive Processing Therapy, and Motivational Interviewing.