Skip to main content

Catherine Derys, LMHC

Staff Licensed Mental Health Counselor
Languages
English
SPECIALTIES
Talk Therapy

Education and training

  • City University of New York Brooklyn College, BS and MA
  • Completed clinical training in Cognitive Behavioral Therapy for Insomnia (CBT-I) through the Beck Institute

Get to know

Catherine Derys, LMHC

Catherine is a graduate from the City University of New York (CUNY) Brooklyn College where she received her Master's Degree in Mental Health Counseling. She is a Licensed Mental Health Counselor experienced in working with adults that struggle with an array of different issues for the past 7 years, both in outpatient and private practice settings. Coupled with her empathic and non-judgmental attitude, she uses a person-centered approach when working with clients. She strives to meet the clients where they are at. Catherine has a passion for helping others reach their full potential, rebuild their confidence, and gain a better insight into themselves through using psychodynamic and CBT interventions. She promotes and encourages "progress over perfection."

Get matched with a clinician like this one

Ready to book your first appointment? Take our 10-minute assessment. We’ll match you with a clinician who meets your needs, has availability, and takes your insurance.

Get started
More Clinicians

Jessica Mars, LCSW

Staff Therapist

Jessica Mars is a Licensed Clinical Social Worker and has worked in clinical practice for over 10 years. Jessica received her undergraduate degree in Social Work at Colorado State University-Pueblo and her master's degree in social work from Newman University. Along with her clinical work, Jessica teaches undergraduate and graduate students of Social Work at the University of Colorado, Colorado Springs, because she values being able to work in her local communities to educate and teach. She identifies as a lifelong learner and incorporates that into her treatment approaches. ‍Jessica has primarily focused her clinical practices working with individuals who have experienced intimate partner violence, sexual assault, trauma from medical or physical health problems, substance use, and other forms of trauma. Her approach is culturally aware, trauma informed, and client centered, and she will work closely with her clients to ensure that the treatment approach and plan is thoughtful and matches what the client may need. ‍Jessica has extended training in EMDR, TF-CBT, CBT, DBT, narrative therapy, motivational interviewing, developmental trauma, suicidality, and trauma informed care. Jessica will encourage you to increase your awareness of thoughts, feelings and behaviors in the present and to increase your personal sense of freedom and well-being. Jessica hopes to work with you to empower you and help you recognize your own strengths, with compassion for both yourself and for others.

Rebecca Siwanowicz, LCSW

Staff Therapist

Rebecca Siwanowicz is a Licensed Clinical Social Worker who began her career in 2013, maintaining various positions in both inpatient and outpatient settings while treating substance use and mental health disorders. Rebecca graduated with her BSW from Florida Atlantic University in 2013 and graduated with her MSW in 2016. Rebecca is trained in Accelerated Resolution Therapy and is a Master's Level Certified Addiction Professional in the state of Florida.‍Rebecca's areas of expertise are trauma, anxiety and depressive disorders, issues related to codependency and low self-esteem, life transitions, self-care and emotion regulation. Rebecca takes an individualistic approach when treating clients, greatly valuing and promoting individuality and autonomy. Rebecca practices through the lens of Family Systems Theory and Attachment Theory, utilizing components of Existentialism, Strength Based Therapy, Dialectical Behavior Therapy, 12 Step Principles, and Client Centered Therapy. Rebecca takes a psychosocial approach toward treatment, providing her clients with unconditional positive regard, psychoeducation, and practical coping skills to support them in building a life of their choosing.

Yumi Lemaster, LCSW

Staff Therapist

Yumi Lemaster is a Licensed Clinical Social Worker with a strong foundation in social psychology and military social work. She earned her Bachelor’s degree in Social Psychology from Park University and her Master of Social Work from Fayetteville State University through the U.S. Army’s expedited program. Her clinical training included work at Schofield Barracks and Tripler Army Medical Center in Hawaii. Yumi holds certifications in Rational Emotive Behavioral Therapy and Prolonged Exposure Therapy. She completed her Army career as a Brigade Behavioral Health Officer, supporting thousands of service members and their families through deployments, reintegration, and a wide range of behavioral health concerns.

Yumi is a direct, yet tender and genuine therapist who meets patients where they are in life. She works to understand the whole person and balances a solution-oriented approach with deep psychotherapy. Her style is collaborative and goal focused, while also encouraging insight into patterns or experiences that may have been difficult to acknowledge. She values transparency and views respectful conflict and open feedback as meaningful parts of growth and the therapeutic process.

Yumi begins by gaining an understanding of the concerns that bring a patient to therapy, along with relevant personal history. Together, she and the patient identify therapy goals and develop a treatment plan, often with a 3–6 month framework. As life circumstances and challenges evolve, she works collaboratively with patients to adjust goals and approaches to best support ongoing progress.

Brianna Quirk, LMHC

Staff Therapist

Brianna Quirk is a licensed mental health counselor in the state of New York. She attended SUNY Oneonta for her Bachelor’s degree in psychology, and went on to Adelphi University where she received her Master’s degree in Mental Health Counseling.


Brianna has extensive experience working with children, adolescents, and adults with a variety of different struggles. Brianna is trained in cognitive behavioral therapy, and helps her clients to recognize and change harmful and unhelpful patterns of thought and behavior, implement coping skills, and set goals for the future, leading to a happier and healthier existence. She uses techniques from CBT, solution focused therapy, psychodynamic therapy, and more to tailor each client’s sessions to their individual needs.


Brianna specializes in working with individuals from a variety of different backgrounds and mental health issues: such as anxiety, ADHD, stress, depression, trauma, school avoidance and grief/loss. She also has extensive experience working with members of
the LGBTQ+ community.

Kara Burdelski, LPC

Staff Therapist

Kara Burdelski is a Licensed Professional Counselor who has been working as an experienced psychotherapist for over the last twelve years. She has worked with a variety of demographics in various settings such as health care settings, community mental health, and even mobile therapy. Kara attended undergraduate school in Springfield, MO and obtained her graduate degree, a Master's of Science in Counseling Psychology, from Chatham University in Pittsburgh, PA. Over the last six years, she has worked predominately with adults with serious and persistent mental illness (SPMI) in a health care setting with patients who have been diagnosed with HIV/AIDS as well as other varieties of chronic conditions. Kara has experience in working with individuals who have disorders like depression, anxiety, psychosis, PTSD, bipolar, trauma, chronic medical issues, grief, and substance abuse disorders. She allows her clients to direct the type of treatment they need since every human is an expert of their own experience. The style of treatment Kara uses is tailored to meet the needs of each individual client with compassion and respect. She values the entire person. Kara utilizes unconditional positive regard with each individual she works with. Kara specializes in working with minorities, and the LGBTQAI+ community, and has considerable experience serving individuals who face chronic pain and disabling health conditions. She also practices in a harm reduction approach. Kara engages in a respectful position towards people using substances including alcohol and can assist with strategies for reduction including abstinence-based recovery. She believes in an all-inclusive approach that utilizes mindfulness, cognitive behavioral therapy, solution focused, behavioral activation techniques, and acceptance and commitment therapy. Kara is committed to providing you with a space to grow, learn self-acceptance, and focus on your commitment to yourself.

Fanta Conde, LMFT

Staff Therapist

Fanta Conde is a licensed doctoral-level Marriage and Family Therapist with over 18 years of experience in behavioral health. She has provided psychotherapy and clinical leadership across outpatient, community mental health, and integrated care settings. She has supported diverse populations with complex mental health needs and has held leadership roles, including Director of Mental Health Programs, overseeing clinical operations and multidisciplinary teams. Her work is informed by systems-based, relational, and evidence-based therapies, allowing her to support individuals, couples, and families with diverse concerns.

Patients can expect a warm, supportive, and collaborative therapeutic space where they feel respected, heard, and understood. Fanta provides high-quality, individualized care that is culturally responsive and inclusive. She balances compassion with clinical rigor, helping patients gain insight, build practical skills, and move toward meaningful, sustainable change aligned with their values and lived experiences.

Fanta begins by developing a thorough understanding of each patient’s history, relationships, strengths, and goals. Sessions are conversational, thoughtfully paced, and focused on both insight and practical strategies. Together, she and the patient collaborate on a personalized treatment plan using evidence-based approaches while remaining flexible, supportive, and responsive to evolving needs.

Ready to get matched?

Start our short assessment
Specialties
Talk Therapy
States
New York
Languages
English
Takes insurance
Virtual visits
8 years experience