Gwendolyn Sullivan, LMHC

Provider type: Therapist

Serving: Adult & Pediatric

About Gwendolyn Sullivan, LMHC

Dr. Blackett-Sullivan treats patients starting 3 years old. Dr. Blackett-Sullivan is a New York State licensed mental health counselor. She has experience treating children, teenagers, adults, families and couples. She has expertise in the areas of trauma focused cognitive behavioral therapy (CBT) she is trained in eye movement desensitization and reprocessing (EMDR) as well as working with couples utilizing the John and Julie Gottman’s curriculum. Ms. Blackett-Sullivan specializes in substance abuse, grief, sexual assault, PTSD, domestic violence and works with diverse mental health populations. She has supported families dealing with crisis intervention, dealing with disabilities and trauma. She utilizes various evidenced based and client centered approaches with the aim of facilitating growth, healing, change and teaches coping skills. Gwen graduated from John Jay College of Criminal Justice of The City University of New York with a Master’s degree in forensic psychology and from Herbert H. Lehman College of The City of New York with a Master’s degree in special education. Gwen is certified in the state of New York as a teacher of both elementary and special education .She is also certified as an educational administrator on both the school and district levels. Gwen completed a post Masters advanced certification in clinical mental health counseling from Medaille College in Buffalo New York, and completed a post master’s educational administration licensure program at Massachusetts College of Liberal Arts in North Adams.


  • Adolescent/Teen Issues
  • Agoraphobia
  • Anger Management
  • Anxiety
  • Behavioral Therapy
  • Bereavement/Grief Counseling
  • Binge Eating
  • Borderline Personality Disorder (BPD)
  • Bullying
  • Cognitive Behavioral Therapy (CBT)
  • Cognitive Therapy
  • Couples Conflict Resolution
  • Cultural Diversity Issues
  • Depression
  • Eating Disorder
  • Emotional Overeating
  • Gender Dysphoria
  • Hyperactive Disorder (ADD/ADHD)
  • Irrational Fears/Phobias
  • Loneliness
  • Malaise
  • Marriage Conflict Resolution
  • Marriage Counseling
  • Mental Health Consultation
  • Mental Health Problem
  • Mental Illness
  • Mood Disorders
  • Mood Swings
  • Obsessive Compulsive Disorder (OCD)
  • Panic Attack
  • Parenting Counseling
  • Phobia
  • Post-Traumatic Stress Disorder (PTSD) Counseling
  • Pre-College Fears
  • Pre-Move In Couples Counseling
  • Premarital Conflict Resolution
  • Premarital Counseling
  • Psychological Trauma
  • Psychology Consultation
  • Psychotherapy
  • Relationship Counseling
  • Relationship Struggles
  • Separation Anxiety
  • Sleep Disorder
  • Sleep Problems
  • Social Anxiety
  • Stress
  • Stress Management
  • Therapy
  • Worry
  • Education & Certifications

    City University of New York

    John Jay

    City University of New York

    Lehman College


    Yorktown Heights, NY

    1940 Commerce Street, Suite 309
    Yorktown Heights, NY 10598-4448