Cassandra Garcia-Lozano, LPC

Michelle Shya, Licensed Clinical Social Worker (LCSW) at Talkiatry, has provided care in the field for almost a decade. Working with individuals and families, she has connected and fostered ties with a broad spectrum of clients, including adolescent, adult, and geriatric services. Michelle's practice style centers on providing a safe and understanding space for clients to share, learn, identify, and address their unique therapeutic needs. Using cognitive behavioral therapy (CBT), Michelle focuses on the relationships between thoughts, emotions, and behaviors to assist the client in discovering their personal strengths and motivation to realize their individual life goals. Michelle completed her undergraduate Social Work education at Millersville University. Later at Marywood University, she earned her Master's in Social Work, with a specialization in Child and Family Practice. Michelle has had a wide variety of experiences working as a Social Worker in therapeutic and social service settings. She has provided case management and therapeutic care in domestic violence shelters, treatment foster care, community organizations, and hospice in-home support. In Michelle's experience in providing therapy, she has maintained a generalist practice, working with a variety of individuals facing personal barriers and challenges. By taking a step-by-step therapeutic approach, the client is able to better understand and process their thoughts as well as feelings to drive actionable 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.

Trevor Ramkissoon, LPC, LMHC, is a Licensed Professional Counselor in New Jersey and a Licensed Mental Health Counselor in Washington. For more than 20 years, he has worked with individuals, couples, and families in both clinical and corporate settings. His background includes therapy, crisis intervention, clinical supervision, and behavioral health consulting. He holds a Master’s in Counseling from Kean University and a Bachelor’s in Psychology from Montclair State University. Trevor’s approach integrates Cognitive Behavioral Therapy (CBT), Eye Movement Desensitization and Reprocessing (EMDR), mindfulness, and holistic care to support the whole person—not just the problem.

Patients can expect Trevor to listen carefully, ask thoughtful questions, and help identify patterns that bring clarity to their experiences. He values honesty and open communication, even when discussing difficult topics. His goal is to help patients feel grounded, confident, and empowered to navigate life’s challenges.

Trevor begins with an open conversation to understand what’s been happening and what patients hope to change or explore. Together, he and his patients set goals and develop a plan tailored to their pace and comfort level, creating a collaborative path toward lasting growth and well-being.

Rachel Jones, LPC, is a Licensed Professional Counselor with extensive experience across inpatient, outpatient, community mental health, private practice, and telehealth settings. Her work has included serving as a substance abuse counselor in a county juvenile jail and DWI diversion program, conducting assessments and providing testimony for guardianship hearings, and offering therapeutic support within academic settings from elementary through college levels. She has also developed safety protocols, written IEPs, and taught college courses on workforce and career skills. Rachel earned her Bachelor of Science in Psychology from Missouri Western State University and her Master of Science in Psychology from the University of Central Missouri. She has been a licensed professional counselor since 2005.

Rachel is a client-centered therapist who helps guide individuals in exploring their experiences and discovering their own strengths and resources. She fosters a supportive and nonjudgmental environment where clients can develop practical skills to navigate life challenges, strengthen relationships, and promote personal growth.

During the first session, Rachel focuses on listening and understanding each client’s story. Through gentle guidance, she helps clarify what brings them to therapy and collaborates to identify meaningful goals. Together, they create a personalized treatment plan that serves as a roadmap for ongoing sessions, building skills and insights that support lasting change.

Nathan Roberson is a Licensed Clinical Mental Health Counselor in North Carolina and a Licensed Professional Counselor in South Carolina and Texas. Nathan has a Masters in Counseling from Southern Methodist University. He has worked in primarily in outpatient settings that focused on mental health and substance use.

Nathan enjoys helping adults identify what is holding them back from creating the life that they want and working together to overcome the feelings, limiting beliefs, traumas, etc, that stand in the way of that goal.  

When working with clients, the approach Nathan will use varies with what is needed to help address the issues at hand. During the sessions, Nathan will draw upon CBT, Solution-Focused, psychodynamic, and reality theory, among others. Nathan believes having the flexibility to use the best tool for the job helps because every client is different and will respond differently to a specific approach.

Kacey Peterson is a Licensed Mental Health Counselor with Diagnostic Privilege in New York and Florida, where she also serves as a Telehealth Provider. She is a Nationally Certified Counselor and earned her Bachelor’s degree in Psychology and Sociology from Florida Atlantic University before completing her Master’s in Clinical Mental Health Counseling at Long Island University.

Kacey has experience supporting individuals in residential, crisis, and outpatient settings, helping those managing anxiety, depression, PTSD, low self-esteem, adjustment issues, and relational challenges. She draws on Cognitive Behavioral, Person-Centered, and Trauma-Informed approaches to ensure care is tailored to each individual’s unique needs and goals.

Kacey’s process centers on creating a safe, supportive, and healing environment where collaboration is key. She works alongside individuals to navigate emotions, explore strengths, and focus on personal goals. With compassion and guidance, Kacey helps her patients uncover resilience, foster growth, and move toward lasting healing and meaningful change.