Faculty Bios

Marti Witherow


Marti Witherow is a licensed marriage and family therapist, a licensed professional counselor and a certified sex therapist. She serves in a supervisory role for ABCST, educating and supervising therapists working towards their sex therapy board certifications.

Michael Sytsma


Dr. Michael Sytsma is a licensed professional counselor in the state of Georgia, a certified sex therapist, and a certified professional counselor supervisor. He loves to teach and is a frequent presenter at professional conferences, couples retreats and workshops, and serves as professor in several graduate schools across the U.S.

Scott Symington, Ph.D.

Dr. Scott Symington is a clinical psychologist and well-known expert in the treatment of anxiety disorders. His book, Freedom from Anxious Thoughts and FeelingsA Two-Step Mindfulness Approach for Moving Beyond Fear and Worry, was released by New Harbinger Publications in February 2019.

Barry McCarthy, Ph.D.

Dr. Barry McCarthy is a professor of psychology at American University, a diplomate in clinical psychology, a diplomate in sex therapy, and a certified couple therapist.

Nancy Wonder, Ph.D.

Dr. Nancy Wonder works in a private practice in Tallahassee, Florida as a Florida Licensed Psychologist conducting psychotherapy for individuals and couples. She has specialized in sexual trauma and addiction in her career.