OUR CLINICIANS

 Brigette A. Erwin, PhD

Founder and Director

Dr. Erwin is a licensed clinical psychologist, speaker, and author, recognized nationally for her contribution to evidence-based treatment of anxiety and related disorders. Dr. Erwin founded the Anxiety and OCD Center to deliver effective treatment to children, adolescents, adults, couples, and families affected by anxiety and related disorders. Through Dr. Erwin Consulting, she provides training to corporations and individual corporate clients. Dr. Erwin also trains other mental health professionals in evidence-based treatment.

Dr. Erwin is Public Relations Chair of the Philadelphia Behavior Therapy Association, on the conference review committee of the Anxiety and Depression Association of America, and on the Saint Charles Borromeo Seminary Archdiocese of Philadelphia Admissions Board.

Dr. Erwin received her Ph.D. from Temple University and completed a National Institute of Mental Health postdoctoral fellowship at the University of Pennsylvania School of Medicine, Department of Psychiatry. Dr. Erwin has since served as Director of the OCD Program at the Anxiety and Agoraphobia Treatment Center, and Associate Director of the Adult Anxiety Clinic of Temple University. The quality of Dr. Erwin’s work and her dedication to the study and treatment of the anxiety disorders has been recognized with awards from the Anxiety Disorders Association of America, the National Institute of Mental Health, the Medical University of South Carolina, Temple University, and Boston College.

She is honored as a 2017 Woman of Influence (Main Line Today).

Ryan Staudle, PsyD

Psychologist

Dr. Ryan Staudle is a licensed clinical psychologist with experience in evidence-based treatment of adults, adolescents, children, and families suffering from anxiety, depression and related disorders. He has training in cognitive-behavioral therapy (CBT), exposure and response prevention (ERP), CBT-focused anger management, motivational interviewing, and insight-oriented treatments. Dr. Staudle also has experience in providing comprehensive psychological assessments.

Dr. Staudle received his Psy.D. in Clinical Psychology from Immaculata University and completed an American Psychological Association accredited pre-doctoral internship at Upper Bay Counseling and Support Services, with a focus on community-based treatment of trauma, substance abuse, and anger management. Dr. Staudle also provided comprehensive psychological assessments, employment screenings, and pre-surgical evaluations. Dr. Staudle earned his Master’s degree in clinical psychology from Immaculata University. He previously participated in training at the Anxiety & OCD Center as a pre-doctoral practicum student. Dr. Staudle also completed his post-doctoral training at the Anxiety & OCD Center in July 2021.

 Matthew Siegel, PsyD

Psychologist

Dr. Matthew Siegel is a licensed clinical psychologist who has experience working with children, adolescents, and adults who struggle with a variety of anxiety-related disorders, depressive disorders, and Obsessive-Compulsive Disorder (OCD). As a certified school psychologist, Dr. Siegel has particular experience working with children who have been diagnosed with ADHD, learning disorders, and Autism Spectrum Disorder. Dr. Siegel understands the importance of
working with clients in a holistic manner, one which encompasses the whole person and helps them to grow within all aspects of their lives.

Dr. Siegel works in a collaborative manner with clients to meet them where they are in their lives. He has a strong interest in working with a variety of populations across the lifespan using cognitive-behavioral therapy (CBT) and exposure and response prevention (ERP) therapy to help clients overcome their anxiety and OCD-related symptoms. Acceptance and Commitment Therapy (ACT) concepts are also incorporated to help clients learn to live a satisfying and fulfilling life that is within their values.

Areas of Specialty:

• Obsessive-compulsive Disorder (OCD)
• Anxiety-related disorders
• Depressive disorders
• Attention-Deficit/Hyperactivity Disorder (ADHD)
• Autism spectrum disorders
• Parent-child management
• Psychological and Psychoeducational Evaluations

Dr. Matthew Siegel is a licensed clinical psychologist and certified school psychologist in the state of Pennsylvania. He earned both his master’s degree and his doctoral degree in Clinical Psychology from the Institute of Graduate Clinical Psychology at Widener University. He completed his American Psychological Association accredited pre-doctoral internships at KeyStone Center and Haverford College Counseling and Psychological Services. At KeyStone Center, Dr. Siegel provided both individual treatment and group treatment to patients with substance use disorders as well as anxiety, depression, Bipolar Disorder, and PTSD. At Haverford CAPS, Dr. Siegel worked with young adults who experienced anxiety, depression, OCD, and identity issues. In July 2022, Dr. Siegel completed his post-doctoral residency at the
Anxiety & OCD Center.

Dr. Siegel is currently accepting new clients for in-person and telehealth sessions. He is also authorized by PSYPACT (16710) to practice telehealth in a number of states across the country.

Jennifer Taylor, PsyD

Postdoctoral Resident

Dr. Jennifer (Jenna) Taylor is a Postdoctoral Resident at the Anxiety and OCD Center with
experience providing evidence-based treatments to children, adolescents, adults, and families.
She has acquired training in inpatient, residential, school, and outpatient treatment settings,
providing individual and group therapy, as well as conducting comprehensive psycho-
educational evaluations with a wide range of individuals and families. Dr. Taylor has experience
providing therapeutic and assessment services to adolescents and adults struggling with eating
disorders, adults with serious and persistent mental illnesses such as schizophrenia, as well as
children, adolescents, and adults with anxiety and related disorders, OCD, depressive disorders,
ADHD, and learning disorders. Dr. Taylor has received training in cognitive-behavioral therapy
(CBT), exposure and response prevention (ERP), dialectical behavior therapy (DBT), acceptance
and commitment therapy (ACT), and family systems interventions. She is also skilled at
collaborating with schools, physicians, and other treatment providers in order to maximize
treatment gains across settings. Dr. Taylor aims to create a warm and collaborative treatment
environment in order to help clients reach their goals.

Dr. Taylor received her PsyD from Widener University’s Institute of Graduate Clinical
Psychology (IGCP) in June, 2023. She also obtained her Master’s degree in Clinical Psychology
from IGCP and her Bachelor’s degree in Psychology from Boston College. Dr. Taylor acquired
training in psycho-educational assessment and evidence-based treatments for children,
adolescents, and families through IGCP’s child, adolescent, and family therapy concentration
and school psychology certification track. She became a certified school psychologist in the state
of Pennsylvania in 2023. Dr. Taylor completed her American Psychological Association
accredited pre-doctoral internship at the Anxiety and OCD Center under the supervision of Dr. Brigette Erwin and Dr. Ryan Staudle, and she is currently completing her postdoctoral training at the Center.

Kate Billings, M.S., NCC

Counseling Resident

Kate Billings, M.S., NCC is a counseling resident at the Anxiety and OCD Center under the supervision of Dr. Brigette Erwin and Dr. Ryan Staudle.. Kate provides evidence-based treatment to children, adolescents, adults and families. Kate has experience working within the school and outpatient environments helping clients who struggle with disorders including:

• Selective Mutism

• Social Anxiety Disorder

• Generalized Anxiety Disorder

• Obsessive Compulsive Disorder

• Tourette’s Syndrome

• Impulse Control Disorders

• Major Depressive Disorder

• Panic Disorder

• Trichotillomania

Kate received a Bachelor’s of Science degree in Human Development and Family Studies from Penn State University and she took part in research at the Children’s Hospital of Philadelphia. Kate received her Master’s in Mental Health Counseling degree from the Philadelphia College of Osteopathic Medicine. After completing her Master’s Degree Kate completed her National Certified Counselor Certification. Kate is trained in Cognitive-Behavioral Therapy (CBT).

Kate is skilled at meeting the individual treatment goals of clients through evidence-based practices and seeks to create a positive, respectful and collaborative relationship with her clients.

 Lynn Harmer, MEd

Counseling Resident

Lynn Harmer, MEd is a counseling resident in Marriage and Family Therapy under the supervision of Dr. Brigette Erwin and Dr. Ryan Staudle. Lynn has experience treating individuals affected by Generalized Anxiety Disorder, (GAD), Social Anxiety Disorder (SAD), Obsessive-Compulsive Disorder (OCD), Attention-Deficit/Hyperactivity Disorder (ADHD), and Major Depressive Disorders (MDD). Lynn is trained in cognitive behavioral therapy (CBT), exposure with response prevention (ERP), dialectical behavior therapy (DBT), motivational interviewing (MI) and Emotion Focused Therapy (EFT). She is skilled at utilizing evidence-based interventions to ensure the efficacy of treatment and attainment of treatment goals. Lynn takes a comprehensive approach to treatment and collaborates with schools and physicians to maximize treatment outcomes.

Lynn graduated from Eastern University with a Master of Education in Special Education. She is presently pursuing her Doctorate in Marriage and Family Therapy from Eastern University, graduating in 2023.

Nick Everett, MS

Counseling Resident

Nick Everett, MS, is a counseling resident at the Anxiety & OCD Center under the supervision of Dr. Brigette Erwin and Dr. Ryan Staudle. Nick has experience working with individuals and parents across the lifespan in an outpatient setting. Additionally, Nick has experience working with children in school settings and communicating with treatment teams outside the center to reinforce comprehensive care for individuals and students. Nick is trained in cognitive-behavioral therapy (CBT), exposure with response prevention (ERP), applied behavioral analysis (ABA), and dialectical behavior therapy (DBT). Nick is skilled at utilizing evidence-based practices to achieve treatment goals and strives to establish a warm and inviting therapeutic environment where he prioritizes clients’ concerns, goals, and values. Nick utilizes a person-centered approach in session with an authentic presence of care and support and CBT to inform his approach to treatment regarding interventions and understanding the individuals’ pathology. While working with Nick, clients will learn more about themselves, their issues, how to address them, and ways to incorporate strength and resilience when facing obstacles. Nick recognizes that starting therapy brings fear and anxiety, like any new experience. He emphasizes that new experiences also bring learning, development, and growth over time, an essential aspect of exposure therapy.

Specific disorders Nick has experience with:

• Obsessive-compulsive spectrum (OCD, trichotillomania, dermatillomania, hoarding)
• Anxiety spectrum (social anxiety, GAD, phobias, selective mutism)
• Depression
• Tinnitus
• Misophonia
• Autism spectrum disorder
• Borderline personality disorder

Nick received a Bachelor of Arts in Psychology with a minor in Sociology from Bloomsburg University of Pennsylvania and a Master of Science in Mental Health Counseling degree from the Philadelphia College of Osteopathic Medicine. Nick is continuing his education in a PhD program in Counselor Education and Supervision at Duquesne University. In this program, Nick is gaining experience in counseling research, teaching instruction at the post-graduate level, and supervision of mental health clinicians. Nick’s passion lies in extending knowledge to others, mentoring those new to the field, and leadership in academia.

Nick is a doctoral candidate at Duquesne University’s Counselor Education and Supervision program. In this program, Nick is gaining experience in counseling research, teaching instruction at the post-graduate level, and supervision of mental health clinicians. Additionally, Nick has received a master’s degree in mental health counseling at the Philadelphia College of Osteopathic Medicine and completed his clinical training at the Anxiety & OCD Center. Nick also received a Bachelor of Arts in Psychology with a minor in Sociology from Bloomsburg University of Pennsylvania. Nick’s passion lies in extending knowledge to others, mentoring those new to the field, and leadership in academia. Nick will complete his PhD in 2026. Nick is also working toward a license for counseling.

 Sr. M. Marcelina Mikulska, CSFN, MS, LPC, NCC

Licensed Professional Counselor

Sr. Marcelina Mikulska is a bilingual (Polish and English) licensed professional counselor and national certified counselor with experience in evidence-based treatment of children, adolescents, adults, couples, families, and groups suffering from trauma, grief, anxiety, depression, and related disorders.  A faith-based, mission-driven, and outcomes-oriented approach to healing matches her personal values that she demonstrates and cultivates in her personal and professional life and that are assets in communicating with integrity regarding the issues of stress, crisis, and life transitions or adjustments.

Sr. Marcelina’s identity,  love of Existentialism, Christian Anthropology, Judeo-Christian Tradition, and Spirituality of Relationship guided her toward a psychotherapeutic movement called Logotherapy.  She incorporates this orientation to accompany others on their way to discovering meaning and purpose in life.  She is a dedicated and collaborating counselor working with multicultural, multilinguistic, and religiously diverse populations.  Furthermore, she utilizes Cognitive Behavioral Therapy (CBT), Trauma Focused – Cognitive Behavioral Therapy (TF-CBT), and Motivational Interviewing (MI) to motivate people to rediscover their dignity. Sr. Marcelina earned her Master’s of Science degree in Counseling Psychology with a concentration in Pastoral Counseling from Holy Family University. She is a member of the Catholic Psychotherapy Association. She also holds a Bachelor’s of Arts degree in Early Childhood and Elementary Education.

Lauren Rogers, M.A.

Doctoral Intern

Lauren Rogers, M.A. is a doctoral intern at the Anxiety and OCD Center with experience providing treatment and assessment services to children, adolescents, and adults. Lauren has acquired training in inpatient, residential, forensic, and school settings providing individual and group therapy, as well as conducting comprehensive psycho-educational evaluations with students and adolescents. Prior to attending IGCP, Lauren worked as a paraprofessional in a Delaware Title I middle school. As a doctoral practicum student and intern, she has provided therapeutic and assessment services to adults with serious and persistent mental illnesses such as schizophrenia in inpatient and forensic settings, as well as adolescents and adults struggling with eating disorders. She has also provided assessment services to children and adolescents in a school setting with a variety of diagnoses such as anxiety and related disorders, depressive disorders, ADHD, and learning disorders.

Lauren is a doctoral candidate at Widener University’s Institute of Graduate Clinical Psychology (IGCP). She obtained her Master’s degree in Forensic Psychology from Fairleigh Dickenson University in February 2019, her Master’s degree in Clinical Psychology from ICGP in May 2022, and will obtain her PsyD in Clinical Psychology in 2024. Lauren has also completed all necessary coursework and training to obtain her Pennsylvania school psychology certification. She has also completed the necessary coursework to obtain her biofeedback certification. Lauren completed the first rotation of her American Psychological Association accredited pre-doctoral internship with Delaware Psychiatric Center and is currently completing her American Psychological Association accredited pre-doctoral internship at the Anxiety and OCD Center under the supervision of Dr. Brigette Erwin and Dr. Ryan Staudle.

Quinlin Taylor, BS

Psychology Trainee

Quinlin Taylor, BS, is a psychology trainee at the Anxiety and OCD Center working under the supervision of Dr. Brigette Erwin and Dr. Ryan Staudle. Quinlin uses a holistic approach to treatment when working with clients. Prior to entering Widener University Institute for Graduate Clinical Psychology, she has had experience working as a Behavioral Health Technician for Autistic Children.

Quinlin obtained her Bachelor’s Degree in psychology from West Chester University of Pennsylvania. Quinlin also has minors in Nutrition and Communications. Quinlin is currently a first year graduate student working on her Doctorate Degree in Psychology from Widener University Institute for Graduate Clinical Psychology with an anticipated graduation date in the spring of 2028. Quinlin is working towards a concentration in cross cultural/multicultural psychology as well as adolescent and family therapy.

 Susan Hamilton

Business Manager

Susan Hamilton has worked in the health care industry for more than 10 years, assisting physicians and surgeons locally and nationally with medical documentation. Susan joined the Anxiety & OCD Center as business manager in 2015.

 Elizabeth Teta

Administrative Assistant

Liz Teta has worked in the service industry for more than 13 years and has a strong interest in service and advocacy in the behavioral healthcare industry. Liz joined the Anxiety & OCD Center as an administrative assistant in 2021.

 Emily D’Antonio

Administrative Assistant

Emily D’Antonio is currently a student at Catholic University pursuing a Bachelors of Arts in Psychology, where she also works as an undergraduate research assistant. Emily joined the Anxiety and OCD Center as an administrative assistant in 2019.