Sophie Weinberg, MD

Dr. Catherine Shim is a board-certified psychiatrist and completed her training at the University of Washington, where she received additional certifications in Psychotherapy and Community Psychiatry.  Prior to joining Talkiatry, she spent years serving the mental health needs of underserved communities as well as our Veteran population.  Dr. Cat is excited to bring that same dedication and selfless service to her Talkiatry patients!

Dr. Cat is experienced in managing a multitude of mental health conditions, but her specialty is providing behaviorally oriented trauma-informed care.  Her approach is to treat primarily through psychotherapy and behavioral change, with medication management serving as an important (and often essential) adjuvant to optimizing mental health.

Dr. Cat tends to have a very casual engagement style, so expect a frank but open conversation during your first meetings with her.  Following that initial screening, anticipate a candid discussion about her approach to your condition and an initial treatment plan.  Please feel free to bring up any questions or concerns at any time during this process, and note-taking is highly encouraged!

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Sibi Selvarajah is a Licensed Clinical Social Worker (LCSW) renowned for his compassionate approach and dedication to fostering emotional well-being. Sibi's career in mental health has been marked by a dedication to evidence-based practice and a client-centered approach. His experience working as a group and individual counselor at a private substance abuse outpatient treatment center in Manhattan provided him with invaluable knowledge and insight into helping individuals struggling with substance use disorder, anxiety, depression, trauma, and relationship issues, among others. Sibi earned his Bachelor's degree in Psychology from New York University, where he developed a strong foundation in psychological theories and practices. He went on to complete his Master's degree in Social Work at Yeshiva University, gaining advanced knowledge and hands-on experience in therapeutic techniques. As a licensed clinical social worker, Sibi is known for his empathetic listening skills and his ability to build strong therapeutic alliances with his clients. His therapeutic approach is integrative, drawing from multiple modalities to tailor treatment plans that best meet the unique needs of each individual. Outside of his professional work, Sibi is dedicated to continuous learning and personal growth. He regularly attends workshops and conferences to stay abreast of the latest advancements in mental health therapy. Sibi also believes in the importance of self-care and encourages his clients to engage in practices that promote overall well-being. Through his work, Sibi Selvarajah continues to make a profound impact on the lives of those he serves, helping them navigate their mental health journeys with hope and resilience.

Dr. Tony Tu is a board certified adult psychiatrist who emphasizes patient education and a psychodynamic approach to outpatient psychiatry. His passion for empowering patients with knowledge stems from his academic experience in psychiatry residency training. Dr. Tu's practice focuses on blending medication management together with psychotherapy. He also prioritizes collaboration with your therapist and encourages working together as a team. Dr. Tu is a graduate of the University of Chicago Pritzker School of Medicine where he completed an MD and PhD combined program which helped develop his "doctors as teachers” style of practice. Dr. Tu completed his psychiatry residency training at Loyola University Medical Center in Illinois. Dr. Tu served as an Associate Program Director of Loyola's Psychiatry residency training program for two years, and now maintains an Affiliate Assistant Professor of Psychiatry role with Loyola. He continues to contribute to residency training, as well as mentorship of medical students and psychology externs. Over the years, Dr. Tu has received several awards that demonstrate his affinity for teaching, including the Educator of the Year Award in 2022 from the Loyola Psychiatry Residency Program. Areas of specialization include psychopharmacology, patient-centered medicine, and combination treatment of psychiatry and psychotherapy. Dr. Tu understands that medications are not the end-all-be-all of treatment, but just the beginning. For trauma and acute stress, he understands that the journey starts at the tip of the iceberg, with much to explore as you feel more ready.

Dr. Faizan Syed is a board-certified attending psychiatrist who graduated from St. George's University School of Medicine in 2012. He completed his residency in adult psychiatry at Creedmoor Psychiatric Center, an affiliate of Columbia University, in June 2016 .Dr. Syed was born in Karachi, Pakistan, and has lived transnationally in the United States, the Caribbean, the United Kingdom, and the Middle East throughout his life. He is currently based in Queens, NY, and alongside his professional development in his career as a psychiatrist, he has also worked to develop himself personally through writing. As a poet, essayist, and author, he has been published numerous times, and he maintains connections with his community through his participation in a group known as the Queens Poetic Alchemy Collective. He has spoken out publicly against the cultural stigma against mental health that has become a barrier to seeking and finding help. He has also been featured on Humans of New York. Dr. Syed believes strongly in the power and importance of psychotherapy as part of the therapeutic process. As such, he integrates individualized psychotherapy for each patient he sees and tailors various techniques to suit each patient's needs. He believes in an integrative, holistic approach that borrows from and blends various schools of psychology, philosophy, and neuroscience, including mindfulness, existentialism, cognitive-behavioral therapy, dialectical therapy, psychodynamics, genetics, and psychopharmacology. In addition, he is a great believer in the therapeutic power of the arts, whether it is visual arts, music, bibliotherapy, or expressive writing. Dr. Syed focuses on exploring the role of meaning in every patient's life so they can define and fulfill their potential in many areas of life. He has experience working with patients of all ages who have struggled with trauma, relationship or attachment issues, bipolar disorder, depression, anxiety, panic attacks, psychosis, and personality disorders.

Background and credentials    

Dr. Catherine Cashman is triple board-certified by the American Board of  Psychiatry and Neurology in Adult Psychiatry, Child & Adolescent  Psychiatry, and Forensic Psychiatry. She holds two Bachelor’s degrees: one in  Finance from New York University, and another in Biology from the University  of New Orleans. She earned her medical degree from Nova Southeastern  University and completed an Adult Psychiatry residency at LSU Health Sciences  Center in New Orleans. Dr. Cashman subsequently completed two fellowships:  the first in Child & Adolescent Psychiatry at LSU New Orleans, along with  a certification in Infant Mental Health (working with children ages 0–6 years  and their caregivers); the second fellowship was in Forensic Psychiatry at  the University of Rochester and the Rochester Regional Forensic Unit.    

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Treatment approach    

Dr. Cashman brings an extensive and specialized skillset to psychiatry,  informed by her triple board-certifications. Her treatment approach  integrates clinical expertise from adult, child and adolescent, and forensic  psychiatry, emphasizing accurate diagnosis, risk assessment, and  evidence-based care. With specialized expertise in forensic psychiatry and  competency assessments, she employs rigorous evaluation methods to accurately  inform treatment planning and risk management, particularly in complex or  legally-involved cases.    

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What you can expect in a first visit    

Patients visiting Dr. Cashman for the first time can expect a detailed and  comprehensive psychiatric evaluation. Given her forensic and clinical  experience, initial assessments are thorough, focusing on clear diagnostic  understanding, individualized risk assessment, and appropriate treatment  planning. Patients can anticipate a collaborative, professional, and  structured environment aimed at clarifying diagnoses and addressing their  unique mental health needs effectively.    

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Why Talkiatry?    

We’re a virtual mental health practice that makes it easy to find great  care. We combine quality and convenience to help you thrive—faster. Our  providers, like this one, are highly trained experts who specialize in  medication management and collaborate with you on a treatment plan that fits  your needs and comfort level.

Sheena Mammen is a Licensed Clinical Social Worker with seven years of experience in various aspects of mental health. She earned her undergraduate degree from Nyack College and her Master's from Stony Brook, which deepened her understanding of the field. She specializes in treating clients with anxiety, depression, ADHD, interpersonal issues, and perfectionism. Sheena employs culturally sensitive and person-centered approaches to tailor treatments for each individual. Her eclectic therapeutic style is rooted in Cognitive Behavioral Therapy, Dialectical Behavioral Therapy, and Attachment Therapy. She also incorporates communication skills, mindfulness, executive functioning, and social skills training into her sessions, fostering comprehensive support for her clients.