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    Our Team

    Meet our dedicated team of addiction treatment experts.

    Get to know us

    meet our team

    Dr. Marisa Sisk

    Chief Clinical Officer/Partner

    meet our team

    Bina Khaki

    Clinical Director

    meet our team

    David Coleman

    Primary Therapist

    meet our team

    Tina Ahdot, PA

    Physician Assistant

    adrian ruvalcaba

    Adrian Ruvalcabra

    Lead Case Manager

    charles carpenter

    Charles Carpenter, MD

    Addiction Medicine

    Erika Kamish

    Erika Kamish, PA

    Physician Assistant

    Harshdeep Brar

    Harshdeep Brar, NP

    Nurse Practicioner

    Kourtney Benson

    Kourtney Benson

    Primary Therapist

    Natasha Perreira Agudelo

    Natasha Perreira Agudelo

    Nursing

    Tina Ahdoot

    Tina Ahdoot, PA

    Physician Assistant

    arthur dixon

    Arthur dixon

    Lead Client Advisor

    clovis clark

    Clovis Clark

    Client Advisor

    graham vowell

    Graham Vowell

    Client Advisor

    greg knudson

    Greg Knudson

    Client Advisor

    matt cohen

    Matt Cohen

    Client Advisor

    Tina Karapetyan

    Tina Karapetyan

    Lead Client Advisor

    lukhan mitchell

    Lukhan Mitchell

    Director of Operations/Partner

    casey morrissey

    Casey Morrissey

    Director of Strategic Partnerships/Partner

    Jack Muldoon

    Jack Muldoon

    Program Director

    John Nettles

    John Nettles

    Director of Alumni Relations

    Mike Cheringal

    Mike Cheringal

    CFO/Partner

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    What Our Client Says

    Begin your recovery journey

    Take the first step towards lasting sobriety.

    meet our team

    Dr. Marisa Sisk

    Chief Clinical Officer

    Introducing Dr. Marisa A. Sisk, M.S., Psy.D., founder of Refine Recovery and author of Refine Recovery’s unique clinical curriculum. She is a dedicated professional with a Doctor of Psychology in Clinical Psychology from The Illinois School of Professional Psychology and a Master of Science in Marriage and Family Therapy from Edgewood College. Dr. Sisk’s rich training and clinical background encompass a diverse clientele, including adults, children, and adolescents with varying treatment needs rooted in acute psychopathology.

    As the founder and President of First Commercial Billing Company, specializing in medical billing services for behavioral health, Dr. Sisk has demonstrated her entrepreneurial spirit. Her leadership extends to roles as Executive Director and alternate directorships in Residential Treatment Facilities and intensive day treatment programs. These positions cater to individuals with multi-dimensional dual diagnosis treatment requirements.

    Dr. Sisk’s expertise extends to program development, licensure, accreditation processes, and Utilization Review oversight and management. This comprehensive experience equips her with a deep understanding of clinical case presentation and conceptualization. Driven by this insight, she advocates passionately for both the patients she serves and the facilities she collaborates with.

    meet our team

    Bina Khaki

    Primary Therapist

    Bina Khaki is a compassionate and experienced primary therapist at Refine Recovery, located in Beverly Hills, California. With a deep commitment to helping individuals overcome challenges related to mental health, addiction, and trauma, Bina has been a vital part of the Refine Recovery team, providing personalized and evidence-based care to clients on their journey toward healing and resilience. At Refine Recovery, Bina is known for her holistic approach to therapy, which emphasizes the interconnectedness of mind, body, and spirit in achieving sustainable recovery. She works closely with clients to identify underlying issues, build coping strategies, and empower them to create meaningful and fulfilling lives. Bina is also passionate about fostering a strong foundation of self-awareness and self-compassion in her clients. She integrates self-care practices into her therapeutic approach, encouraging clients to engage in activities that nurture their emotional and physical well-being. Through her guidance, clients learn to prioritize self-care as an essential part of their recovery and personal growth. Dedicated to ongoing professional development, Bina stays current with the latest advancements in therapeutic methods and mental health research. This commitment ensures that clients at Refine Recovery receive the highest standard of care in a warm and supportive environment.
    meet our team

    David Coleman

    Primary Therapist

    David Coleman is a highly skilled and compassionate primary therapist at Refine Recovery, based in Beverly Hills, California. With extensive experience in helping clients overcome mental health challenges such as anxiety, depression, trauma, and relationship difficulties, David is dedicated to guiding individuals toward lasting healing and personal growth. At Refine Recovery, David specializes in tailoring personalized treatment plans for each client, utilizing modalities such as Cognitive Behavioral Therapy (CBT), Dialectical Behavior Therapy (DBT), and trauma-informed care. His empathetic nature, combined with his clinical expertise, allows him to foster a safe and supportive environment for clients navigating their mental health journey. David is also a strong advocate for the importance of self-care in maintaining mental health and overall well-being. He encourages clients to integrate self-care practices into their daily lives, whether through mindfulness, physical activity, or creative expression, as a means of fostering resilience and balance. By modeling self-care in his own life, David demonstrates its transformative power and inspires his clients to prioritize their own well-being. David is committed to continuous professional growth and staying at the forefront of advancements in the mental health field. His dedication ensures that clients at Refine Recovery receive the most effective and innovative care available.
    lukhan mitchell

    Lukhan Mitchell

    Operations Director

    Meet Lukhan Mitchell, our Director of Operations at Refine Recovery, currently immersed in an Addiction Studies program for CADC 2 certification. With over 6 years in behavioral health, Lukhan has progressed from a behavioral health technician to a facility manager and now holds the crucial role of Director of Operations.

    Lukhan’s expertise lies in operational efficiency, staff management, and team building within the medical and wellness sphere. His hands-on experience and natural leadership abilities have played a pivotal role in steering organizational success. His approach to patient care revolves around empathy, compassion, and addressing core issues related to substance abuse, using empathetic communication to facilitate behavior modification.

    Driven by a commitment to continuous professional growth, Lukhan actively pursues continuing education to stay updated on the latest developments in behavioral health. Outside of work, Lukhan finds joy in hobbies like shooting and snowboarding, serving as outlets for relaxation and personal fulfillment, contributing to his balanced and healthy lifestyle. Lukhan’s dedication to excellence and holistic patient care makes him an invaluable asset to the Refine Recovery team.

    casey morrissey

    Casey Morrissey

    Client Care Director

    Meet Casey, a dedicated professional with over 7 years in the addiction field and a certified substance abuse counselor. As one of the founders of the program, Casey actively contributes to the treatment team, ensuring clients, families, and communities are effectively supported for a solid foundation in recovery.

    Casey’s unique expertise lies in blending his extensive experience with family dynamics and the Al-Anon program with his addiction schooling. This distinctive approach helps bridge the gap between families and their loved ones throughout the treatment process.

    When working directly with clients, Casey leverages his years of discharge planning experience to provide clarity, guide through processes, and facilitate mindset changes crucial for sustained recovery. As an advocate for personal transformation, Casey, an avid martial artist in his free time, believes in the power of daily change to transform lives. He encourages clients to take action steps toward realizing their full potential, emphasizing the importance of continuous personal growth in the recovery journey.

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