Angelika Y. Sadar, MA, BCN, BCB-HRV is a licensed psychologist who is board certified in neurofeedback and heart rate variability and is a BCIA approved mentor in neurofeedback. She has been in private practice in the greater Philadelphia area since 1985. Her work over the years has involved all age groups and clinical presentations. She is a treatment coordinator at Sadar Psychological and is a nationally recognized speaker providing education and offering training to other professionals in neurofeedback, biofeedback, and hypnosis. In 2018 she was invited to be part of BrainARC Switzerland and began developing evaluations protocols based on the research of HBImed, Switzerland. Presently, her clinical focus is on patients with complex/comorbid presentations and consulting with other psychologists, medical practitioners and other clinicians regarding EEG, neurofeedback and practice development. She is the executive director of the Northeast Region Biofeedback Society and a board member at large of The Association of Applied Psychophysiology and Biofeedback.