America Calderon, LMHC

Quentina Farrell, LCSW, has extensive experience working with adults in inpatient and outpatient mental health and substance use settings, as well as in residential treatment for eating disorders. She earned her Bachelor’s in Social Work from Augusta University and her Master’s in Social Work from Barry University.

Quentina creates a safe, nonjudgmental environment where patients are heard and validated, without needing to apologize for their pain or emotions. Her therapeutic approach is collaborative: you actively work together to achieve your mental health goals, with progress reflecting the effort you put in.

She begins by understanding your personal history to see how past experiences shape current behaviors and perspectives. Initial sessions focus on setting goals and identifying obstacles, followed by working together to overcome challenges and achieve those goals. This space encourages patients to express themselves authentically.

Ronnie Butler is a Licensed Professional Counselor with over 20 years of experience practicing in psychiatric, clinical, and inpatient settings. After completing an undergraduate degree in psychology in Oklahoma, Ronnie earned a graduate degree in Counseling Psychology from Sam Houston State University in Huntsville, Texas. He is licensed in Oklahoma, Texas, and New Mexico, and holds an endorsement from the Oklahoma State Board of Behavioral Health as a Clinical Supervisor for LPC Interns. Ronnie is also an active member of the American Counseling Association and the Oklahoma Counseling Association’s Mental Health Counselors Division.

Ronnie focuses on supporting individuals facing depression, anxiety, mood instability, trauma, adjustment challenges, attention difficulties, and substance use concerns. He values open communication and collaboration, helping patients set clear and realistic treatment goals. Ronnie strives to create a warm, supportive environment where patients feel heard, respected, and empowered to engage in their own growth process.

In the initial session, Ronnie takes time to thoroughly understand each patient’s history, concerns, and personal goals. He then develops an individualized, measurable treatment plan that aligns with each patient’s needs. Throughout the therapeutic process, Ronnie regularly reassesses progress to ensure therapy remains meaningful, effective, and tailored to achieving lasting change.

Dr. David Guggenheim is an experienced clinical psychologist and health care administrator. He has worked with patients at different stages of life, including children, adolescents, and adults, and he has treated patients living with a wide range of mental health conditions, including anxiety, depression, post-traumatic stress disorder (PTSD), substance use, and attention-deficit hyperactivity disorder. Dr. Guggenheim has specific training in Trauma-Focused Cognitive Behavioral Therapy, Motivational Interviewing, and foundational training in dialectical behavioral therapy. Prior to joining Talkiatry, Dr. Guggenheim served as the Chief Behavioral Health Officer at Callen-Lorde Community Health Center in New York City, specializing in LGBTQ+ health care. In that role, he oversaw teams of providers including psychiatrists, psychologists, and social workers, who collectively provided care to thousands of patients in the New York metropolitan area. While at Callen-Lorde, he also served as co-chair for the behavioral health subcommittee of the Community Health Center Association of New York State; worked as an Adjunct Professor at Post University; and performed volunteer clinical work at the Weill Cornell Center for Human Rights. Before joining Callen-Lorde, Dr. Guggenheim worked as Associate Chief Behavioral Health Officer at Community Health Center, Inc., a federally qualified health center in Connecticut. A recognized expert, Dr. Guggenheim has delivered lectures to audiences ranging from medical schools to corporate executives, and he has been quoted in national media including The Advocate, Yahoo Finance, and Teen Vogue. Dr. Guggenheim has also been honored with an Early Career Achievement Award from the American Psychological Association in 2016. Dr. Guggenheim received his Bachelor of Arts from the University of Connecticut in 2002 and his Doctor of Psychology in Clinical Psychology from the American School of Professional Psychology at Argosy University/Washington, DC in 2009.

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.

Keesha Barthelemy is a Licensed Mental Health Counselor, and a Credentialed Alcoholism and Substance Abuse Counselor Level-2. She has extensive experience working in the mental health and addictions field with adolescents, emerging adults, adults, and families. Keesha has worked directly with clients of various demographics, living with a variety of mental health conditions. She obtained her Undergraduate degree in Psychology from Hofstra University on Long Island, NY, and her graduate degree from Mercy University in Westchester, NY. Keesha has been practicing for 3 years as a Licensed Mental Health Counselor, focusing on anxiety, mood disorders, addictions, and families. Treatment is tailored to the individual, with a foundation in cognitive-behavioral therapy, rational-emotive behavior Therapy, and mindfulness. Furthermore, Keesha has experience working with individuals seeking Faith-based Therapy, with a focus on Christianity and Catholicism. Keesha's vast clinical background has assisted in her development as a well-rounded counselor. She prides herself on possessing great interpersonal skills, and building therapeutic relationships in an effort to assist with growth, healing, and flourishment.

Racquel Ellis is a licensed mental health counselor in the state of New York with extensive experience working with the BIPOC community. She provides inclusive mental wellness services to individuals and families. Racquel has been providing mental health services to individuals and families for over a decade and has been a licensed mental health counselor for the past four years. She specializes in working with the BIPOC community and women, offering therapeutic support for mood disorders, trauma, life transitions, and other chronic challenges impacting overall well-being.