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Joanna Zimmerman headshot leaning on a fence with trees and grass in backgound.

About Me


I received my BA in Psychology from Brandeis University and my PhD in Clinical Psychology from The Catholic University of America. I completed my Doctoral Internship and Post-doctoral Residency at George Mason University’s Counseling and Psychological Services. I am licensed as a Clinical Psychologist by the Board of Psychology of the Commonwealth of Virginia.   


Over the course of my training and career, I have worked in a variety of settings, including a residential treatment facility, an elementary/secondary school, an outpatient hospital clinic, a college counseling center, and private practices. Most recently, I have been in private practice since 2013, during which time I have focused on providing individual therapy to adolescents and adults, ages 14 and up. Prior to private practice, I provided individual and group therapy, crisis management, and outreach services at George Mason University’s Counseling and Psychological Services (CAPS) from 2007-2014, first as a Pre-doctoral Intern, then as a Post-doctoral Resident, and finally as a Staff Psychologist.  I have received specialized training in the treatment of eating disorders and body image concerns, adolescent and young adult psychology, and mindfulness. Additionally, I am a generalist who works with a wide range of presenting concerns, including depression, anxiety, women’s and LGBTQ+ issues, relationship issues and life transitions, college and graduate student concerns, grief and loss, and health-related concerns.


I engage in therapy from a collaborative, humanistic, and feminist approach; Our work together will always be a team effort.  I integrate into my work Cognitive-Behavioral, Insight-Oriented, and Mindfulness-Based therapies, including empirically-supported treatments such as Cognitive-Behavioral Therapy (CBT), Dialectical-Behavior Therapy (DBT), Written Exposure Therapy (WET), and Acceptance and Commitment Therapy (ACT), among others.  For the treatment of Eating Disorders in adolescents, I utilize the Maudsley Approach.

Blue, purple, green and yellow illustrated mountain images.
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