Linda B. Welsh, Ed.D.


Dr. Welsh is one of the founding partners of AATC over 30 years ago. She specializes in treating agoraphobia and anxiety disorders. She is trained in Cognitive Behavioral Therapy as well as psycho-dynamic therapy, EMDR, Erisksonian Hypnosis, Post Traumatic Stress Disorder, and grief counseling. Dr. Welsh utilizes a combination of treatment approaches to customize therapy for maximum effectiveness. She also lectures at local hospitals, medical schools, and community facilities highlighting stress management and communication skills. Dr. Welsh is the author of “Chronic Illness and the Family: A Guide to Living Every Day” which addresses the emotional impact of illness on the patient and family. The majority of new adult clients are evaluated by Dr. Welsh in order to match the individual with the appropriate therapist.


Lori J. Kasmen, Psy.D.

Co-Director/Director of Child and Adolescent Services

As Director of Child and Adolescent Services at AATC, Dr. Kasmen specializes in providing cutting-edge, empirically-supported Cognitive-Behavioral therapy (CBT) and Exposure/Response Prevention (E/RP) to children (ages 4+), teens, families and adults affected by anxiety, OCD and related concerns. An expert in the field with over 20 years of experience, Dr. Kasmen trained under nationally recognized OCD expert, Dr. Jonathan Grayson. She has written numerous articles and presents regularly to consumers and professionals on anxiety and related topics. She also trains psychologists and other professionals in the use of CBT. In addition to her work at AATC, Dr. Kasmen served as the Anxiety Consultant to the School District of Haverford Township.

Dr. Kasmen is a graduate of Emory University where she was elected Phi Beta Kappa. She received her master’s and doctoral degrees from the Georgia School of Professional Psychology. She completed a pre-doctoral internship at duPont Hospital for Children (Nemours). She was awarded a grant by the Nemours foundation to further her training through completion of a three-year post-doctoral fellowship at duPont, with a focus in cognitive-behavioral therapy, neuropsychological evaluation, and psychological treatment of children with medical illnesses.

Dr. Kasmen has extensive experience treating the full range of anxiety disorders across the age span, including severe/complicated OCD (and PANS/PANDAS), Generalized Anxiety Disorder, adjustment disorders, panic disorder, separation anxiety, shyness/social anxiety, stress management, and specific phobias. Dr. Kasmen also treats ADHD, Autism Spectrum Disorders, behavioral issues, school avoidance, sleep problems, tics, and body-focused repetitive disorders (e.g., compulsive hairpulling/skinpicking). In addition to individual treatment, she enjoys working with parents and families around these concerns. Dr. Kasmen is a professional member of the International OCD Foundation and the Pennsylvania Psychological Association.


Chelsea H. Hersperger, Psy.D.

Dr. Hersperger earned her doctorate in clinical psychology at the Graduate School of Applied and Professional Psychology of Rutgers, the State University of New Jersey. While at Rutgers, she received training in the treatment of obsessive-compulsive spectrum disorders, using cognitive-behavioral therapy, exposure and response prevention, and habit reversal training. Dr. Hersperger completed her pre-doctoral internship at Terry Children’s Center in New Castle, DE, where she was trained in trauma-focused cognitive behavioral therapy as well as parent-child interaction therapy. She specializes in the treatment of anxiety and related disorders in children, teens and adults


Lauren Faust, Psy.D.

Dr. Faust is a graduate of Indiana University with degrees in psychology and neuroscience. She received an M.A. from American University and earned her Psy.D from Philadelphia College of Osteopathic Medicine. Dr. Faust specializes in Cognitive Behavioral Therapy and has worked with a variety of individuals in outpatient, community mental health, primary care, and hospital-based settings.


Danielle Trucksess, Ph.D.

Danielle Trucksess received her B.A. in Psychology from the University of Pennsylvania and her Ph.D. in Clinical and Developmental Psychology from Bryn Mawr College. She specializes in the treatment of anxiety and related disorders in children, adolescents, and adults. In addition to her clinical internship and post-doctorate training at University Counseling Centers working with young adults, Dr. Trucksess received specialized training in exposure-based treatments for anxiety disorders at the University of Pennsylvania’s Center for the Treatment and Study of Anxiety (CTSA). She is also a certified school psychologist and has worked at the Upper Darby School District, The Philadelphia School, and the Child Study Institute at Bryn Mawr College in that capacity.


Chelsea Frank, Psy.D.

Dr. Frank received her Psy.D in Clinical Psychology from Philadelphia College of Osteopathic Medicine (PCOM). Additionally, she received her MA in Clinical Counseling Psychology at La Salle University. She specializes in the treatment of anxiety and related disorders using Cognitive Behavioral Therapy, the leader in evidence based treatment. In addition to her clinical internship at Philadelphia College of Osteopathic Medicine providing individual therapy to the PCOM community, and surrounding area, Dr. Frank has trained at diverse sites including Lankenau Medical Center providing behavioral health services, at an inpatient behavioral health hospital providing short term care, and at two different community mental health agencies.


Jessica Harpel, Psy.D.

Dr. Harpel received an M.S. from Millersville University in Clinical Psychology and earned her Psy.D from Philadelphia College of Osteopathic Medicine. Dr. Harpel utilizes an eclectic treatment approach, including Cognitive Behavioral Therapy, Dialectical Behavior Therapy, and Acceptance and Commitment Therapy to best meet each individual’s needs and has worked with a variety of individuals in outpatient, community mental health, primary care, and hospital-based settings. Dr. Harpel also has specialization in evidence-based treatments for feeding and eating disorders, as well as children living with chronic illness. 


Nicole Seligman, Ph.D.

Dr. Seligman received her Ph.D. in Clinical Psychology from Fordham University, NY. She specializes in providing adult and pediatric Cognitive Behavioral Therapy for mood, anxiety, and obsessive-compulsive disorders and complex comorbid presentations, including trauma related and personality disorders. Dr. Seligman has expertise in providing Dialectical Behavioral Therapy treatment for those struggling with emotion regulation, distress tolerance, and interpersonal difficulties. Additionally, she has extensive experience providing evidence-based treatment in a wide range of multidisciplinary settings, including public and private hospitals, universities, private practices, and Veteran Affairs.


Tamar Runyan, Psy.D.

Dr. Runyan received her B.A. in Psychology and Philosophy from the University of Pennsylvania, her M.S. in Elementary Education from Drexel University, and her M.S. and Psy.D. in Clinical Psychology from Philadelphia College of Osteopathic Medicine (PCOM).  Dr. Runyan founded Gan Chabad of the Main Line preschool and taught children of all ages for more than 10 years before pursuing her doctoral degree in clinical psychology. While at PCOM, Dr. Runyan received specialized training and supervision in the treatment of obsessive-compulsive disorders, using cognitive-behavioral therapy and exposure and response prevention (Ex/RP), as well as training in prolonged exposure (PE) therapy for the treatment of post-traumatic stress disorder, at her clinical placement at the University of Pennsylvania’s Center for the Treatment and Study of Anxiety (CTSA). Dr. Runyan’s clinical placements also included the Center for Brief Therapy and Family Medicine at PCOM and ReMed Recovery Care Center in Paoli, where she treated clients with traumatic brain injuries. Dr. Runyan completed her pre-doctoral internship at Chimes PA/Holcomb Behavioral Health Services, where in addition to providing outpatient evaluations and treatment for community mental health clients, her rotations included serving as a mobile therapist for West Philadelphia high school students, an individual and group therapist for clients with substance use and co-occurring disorders, and as a crisis therapist providing crisis hotline phone counseling and in-person individual assessment and counseling. Her clinical interests are focused on providing cognitive-behavioral therapy (CBT) for individuals across the lifespan experiencing anxiety, mood, and trauma-related disorders.



Zachary Hankle, Psy.D.

Dr. Hankle received his M.S. and Psy.D. in Counseling Psychology from Chatham University. He specializes in providing Cognitive Behavioral Therapy to children, adolescents, and adults with various mood, anxiety, and obsessive—compulsive related disorders. Dr. Hankle also is experienced in adapting treatments to address comorbid presentations and situational stressors. He has provided therapy in a variety of multidisciplinary settings such as inpatient hospitals, college counseling, and outpatient clinics. Dr. Hankle values the formation of strong therapeutic relationships with his clients, and he fosters compassion and genuineness within his treatment approach.


Joanne Kling, Ed.D.

Joanne is the Practice Administrator at AATC. She received her MBA from Holy Family University and her Doctoral Degree in Education from Gwynedd Mercy University. She also received a post-masters certification in Behavior Analysis from Penn State University. Joanne is available to assist you with any administrative questions you may have regarding treatment at AATC.