Therapy in Nashua, New Hampshire Sine Montacer, Therapy Clinician

Sine Montacer helps patients build practical skills for emotional regulation, stronger relationships, and relief from anxiety and mood concerns through thoughtful, evidence-based therapy. Serving individuals and families across New Hampshire, she offers a warm, collaborative approach designed to meet each person where they are and support meaningful, lasting change. She works with children, adolescents, teens, young adults, and adults, providing individual therapy as well as couples and family therapy. Sine’s clinical focus includes anxiety, ADHD, and depression, using structured yet compassionate care to help patients better understand patterns, develop coping strategies, and improve daily functioning. She integrates Cognitive Behavioral Therapy (CBT), Dialectical Behavior Therapy (DBT), and mindfulness-based interventions, while also offering additional therapeutic approaches when appropriate. A central passion in Sine’s work is grief-informed and trauma-aware care. She is especially attentive to how loss, life transitions, and unresolved trauma can affect emotions, relationships, and identity over time. Sine is dedicated to creating a safe, respectful space where patients can process difficult experiences, strengthen resilience, and move forward with greater clarity and self-compassion. Sine serves diverse populations, including individuals with Autism Spectrum Disorders, developmental disabilities, and members of the LGBTQ+ community. She is provisionally licensed and practices at LifeStance Health, collaborating closely with supervisors and care teams to ensure high clinical standards. Sine also speaks Danish, supporting culturally responsive mental health care. Originally from Denmark, Sine has lived in the U.S. for over 15 years and has spent time in East and North Africa, experiences that shape her curiosity about people and cultures

Sine Montacer provides services with supervision.