

Dena Lampert,LCSW,CASAC,A-CbT
Executive Director/Owner
Growing up, I never imagined I would become a therapist.
After graduating from business school, I realized my true passion
was providing direct support to people who were suffering and
better understanding how thoughts and feelings shape our
choices. This insight led me to pursue a Master’s degree from
Columbia University School of Social Work.
The Foundation of My Career
I began my career in the field of addiction treatment, initially working with homeless adults struggling with substance use, and achieving CASAC (Credentialed Alcohol and Substance Abuse Counselor) status at that time. Over the next 14 years, I served as a therapist, supervisor, and administrator in an agency who primarily served adolescents and families struggling with chemical dependency in Long Island.
The Birth of Private Practice & Specialty Training
In 2011, I founded a solo private practice in Rockville Centre, New York, focusing on providing mental health and relationship support to teens, young adults, adults, couples, and families.
As the practice grew, I pursued specialized training in Cognitive-Behavioral Therapy (CBT), achieving Diplomate status from the Academy of Cognitive and Behavioral Therapies (link to my listing). This evidence-based approach is the foundation for effectively treating a wide range of mental health conditions.
Evolving into triangle cognitive therapy
In 2018, I transitioned the solo practice into Triangle Cognitive Therapy, a group practice founded on the belief that “two heads are better than one” for expanding the scope and access to care.
Today, my primary role is leading and directing a multidisciplinary team of highly skilled clinicians. I oversee operations across our two physical locations in Rockville Centre and Westbury, and our virtual services, ensuring we maintain our commitment to delivering high-quality, evidence-based CBT to children, adolescents, and adults.
Making Quality Mental Health Care Accessible
As an insurance-based practice, we are specifically designed to provide highly accessible mental health care to our community, offering full support with intake, billing, and insurance to streamline the treatment process.
I am driven by the belief that accessible, high-quality care is essential for personal growth and community well-being. My vision for Triangle Cognitive Therapy is to be a leading resource dedicated to empowering individuals with the practical tools of CBT to effectively alleviate the burdens of mental distress and illness. My team and I are dedicated to making this vision a reality for every person who seeks our support.

