David Guggenheim, PsyD

Katy Childress, LPC, has been licensed in Arizona since 2004. She holds a Master of Counseling degree from the University of Phoenix and has worked in a variety of treatment settings. With extensive experience supporting children, adults, couples, and families, Katy brings a well-rounded and compassionate approach to every session.

Katy is deeply passionate about being a therapist and considers it a privilege to walk alongside people on their journey toward healing and growth. She prioritizes building a strong therapeutic relationship by creating a welcoming, safe space where clients feel heard and respected. She values open, honest communication and actively invites feedback throughout the process.

Katy’s approach is client-centered and flexible, focusing on meeting people where they are emotionally and mentally. She works collaboratively with clients to develop meaningful goals and tailor treatment plans that align with their needs, energy levels, and readiness for change. Her process emphasizes steady progress and mutual trust.

Dr. Thomas O’Brien holds a Bachelor of Science degree from the University of Wisconsin–Madison and earned his medical degree from Midwestern University Chicago College of Osteopathic Medicine. He completed his psychiatry residency at Loyola University Medical Center. Dr. O’Brien has experience practicing across outpatient, PHP, IOP, and inpatient settings.

He strives to create a supportive environment where patients feel heard, respected, and understood. His approach emphasizes a holistic, whole-person method to healing, guided by the patient’s own goals and values. Dr. O’Brien integrates psychotherapy with medication management, drawing on his background in psychodynamic psychopharmacology and acceptance and commitment therapy.

Dr. O’Brien focuses on understanding each patient as a whole to create individualized treatment plans. This begins with a comprehensive history during the initial session to identify biopsychosocial factors. Treatment is then tailored to align with the patient’s unique goals and values, promoting meaningful progress.

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.

Dr. Candice Hacker is a board-certified Psychiatrist at Talkiatry. She completed her Psychiatry residency and a fellowship in Consultation Liaison Psychiatry at Mount Sinai/St. Luke's Hospital. She is passionate about a holistic approach to patient care, trained in psychosomatic medicine, and she has a deep appreciation for the intricate connection between the mind and body. With over 20 years of experience, Dr. Hacker has facilitated excellent outcomes in the treatment of various mental health conditions, including anxiety disorders, mood disorders, and trauma-related conditions. Dr. Hacker believes in creating a safe, nurturing and non-judgmental environment where patients can openly explore their emotions and experiences. By integrating evidence-based psycho-pharmacological modalities with mindfulness and cognitive-behavioral techniques, she empowers her patients to challenge a negative mindset and reach their goals. Beyond her clinical practice, Dr. Hacker is deeply committed to community mental health advocacy and the destigmatization of mental illness.

Darien Orange is a Licensed Mental Health Counselor (LMHC) in New York State. They hold a Master’s degree in Mental Health Counseling and have experience working in college, boarding school, and community mental health settings. Darien brings a broad understanding of diverse clinical environments and works to meet clients where they are with compassion, professionalism, and care.

Darien offers a supportive, down-to-earth, and client-centered therapeutic experience. Their ideal client is someone who is open-minded, willing to put in the work, and comfortable with remote therapy, including being open to new perspectives and approaches. With a foundation in Cognitive Behavioral Therapy (CBT), Darien strives to create a warm, understanding space where clients can safely explore their thoughts, feelings, and personal growth.

Darien views therapy as a collaborative journey, walking alongside clients every step of the way. Their approach focuses on empowerment, helping clients build insight, develop tools, and create meaningful change. Together, they work toward understanding challenges, building confidence, and strengthening the client’s ability to shape their future.

Raquel Weinum is a licensed clinical social worker. Her career in the field has spanned over 20 years and includes work with adults, adolescents, and children from diverse populations and experiences. She has treated a wide range of symptoms and challenges, including but not limited to, depression and other mood disorders, anxiety, chronic stress, trauma, difficulty with relationships, family conflicts, and loss. ‍Her style is warm and engaging. She considers the role of the therapist to be collaborative. As a therapist she aims to create a safe non-judgmental space for self-exploration, discovery, and healing. The goals in the therapeutic process may involve developing new skills to cope with emotional pain, learning to set new boundaries in relationships, or finding more meaning in life. She utilizes a wide range of approaches, including cognitive behavioral therapy, motivational interviewing, narrative therapy, relational and psychodynamic approaches, and mindfulness and embodiment work. Regardless of the modality, her work is always trauma informed and strength-based. ‍Ms. Weinum received her Master's degree in Social Work from Fordham University and her BS in psychology from Brooklyn College. She has worked in varied settings including hospitals, community mental health/substance abuse clinics, and home-based crisis intervention services. She has provided individual and group psychotherapy, and has served in supervisory/administrative roles throughout her career.‍