Our Team
Allie Kaelin, LMFT
Founder
Licensed Marriage and Family Therapist #150370
Allie is a licensed marriage and family therapist and the founder of Bay Tree Therapy Group. She is passionate about creating a supportive, inclusive space where both clients and clinicians feel safe, valued, and empowered. Allie brings a grounded, compassionate presence to her work, drawing on clinical experience to support individuals through life’s challenges. She believes in the power of authentic connection and is dedicated to helping people grow, heal, and thrive.
Allie specializes in supporting young adults as they navigate the often overwhelming transitions of early adulthood. This season of life can bring questions around identity, relationships, career direction, family dynamics, and mental health. Allie offers a grounded, nonjudgmental space where young adults can explore who they are, what they want, and how to move forward with greater clarity and confidence.
Her approach is both direct and kind—providing honest reflections and thoughtful guidance while holding space with warmth and compassion. Allie believes in speaking truth in a way that feels supportive, not harsh, helping clients build insight, develop healthy coping strategies, and deepen their sense of self. Whether you're feeling stuck, anxious, lost, or simply in need of support, she meets you where you are and walks alongside you as you find your way.
Allie earned both her bachelor’s and master’s degrees in counseling from Saint Mary’s College of California, where she developed a strong foundation in relational, culturally responsive, and strengths-based approaches to therapy.
Sandra Berger, LMFT
Clinical Supervisor
Licensed Marriage and Family Therapist #52999
Sandra is a dedicated marriage and family therapist who approaches her clinical work through a systemic lens, recognizing that individuals are deeply influenced by the relationships and environments that surround them. She is passionate about honoring the complexity of the human experience and believes that therapy should be a space where all parts of a person - their thoughts, emotions, relationships, identities, and histories - can be seen, heard, and held with care.
Sandra’s diverse clinical background includes working with children, adolescents, adults, families, and groups in a variety of settings, including schools, community agencies, hospitals, and private practice. This breadth of experience has shaped her ability to meet clients wherever they are, with warmth, respect, and curiosity. Whether supporting someone through a life transition, navigating family dynamics, or processing past trauma, Sandra brings an integrative and compassionate approach that reflects her deep commitment to each client’s unique journey.
She earned her M.A. in Counseling Psychology from Argosy University, where she built a strong foundation in clinical practice and cultivated a deep dedication to supporting individuals with empathy, insight, and cultural responsiveness.
Satwinder Mahabir, LMFT
Clinical Supervisor
Licensed Marriage and Family Therapist #49976
Satwinder is a seasoned marriage and family therapist and certified clinical supervisor who brings presence, curiosity, and care to her work. She believes healing happens in relationship—with oneself, with others, and within the systems that shape us—and is committed to creating a space where clients feel seen, respected, and supported in their full humanity.
With over 20 years of experience, Satwinder has worked with individuals, couples, and families across a variety of settings, and has spent more than a decade mentoring emerging clinicians. Her practice is rooted in trauma-informed care, cultural humility, and gender-affirming practices. She approaches each client with warmth and deep respect for the unique stories shaped by identity, culture, and lived experience.
Satwinder draws from a wide range of modalities, including trauma-focused CBT, DBT, attachment-based therapy, emotionally focused therapy, narrative therapy, and systems approaches. She has extensive experience supporting clients through mood and anxiety disorders, relational challenges, life transitions, and parent-child struggles.
She earned her master’s degree in counseling with a marriage and family therapy emphasis from San Francisco State University, where she deepened her commitment to relational and culturally responsive clinical work.
Stephanie Castillo, LMFT
Clinical Supervisor
Licensed Marriage and Family Therapist #134246
Stephanie is a licensed marriage and family therapist and clinical supervisor who brings warmth, attunement, and authenticity to her work. She understands that beginning therapy can feel vulnerable, and she is committed to creating a space where clients feel safe, heard, and respected. Stephanie believes that the therapeutic relationship is at the heart of meaningful change, and she approaches each session with curiosity, compassion, and a deep respect for her clients' lived experiences.
Stephanie has worked with children, young adults, adults, couples, and families navigating a wide range of concerns, including depression, anxiety, trauma, addiction, grief, life transitions, financial stress, and relational challenges. Her clinical style is collaborative and flexible, shaped by the unique needs of each client rather than a one-size-fits-all approach. She integrates trauma-informed and culturally responsive practices to support clients in making sense of their experiences and reconnecting with their strengths.
As a clinical supervisor, Stephanie is dedicated to fostering the growth of emerging therapists through a relational and reflective supervisory process. She values transparency, ethical integrity, and shared learning, and she creates a supportive environment where supervisees can explore their professional identities with confidence and care.
Stephanie earned her bachelor’s degree in psychology from California State University, Los Angeles, and her master’s degree in marriage and family therapy from California State University, Long Beach.
Jennifer Driskell, AMFT
Associate Marriage and Family Therapist #138361
Jennifer is an associate marriage and family therapist who offers a grounded, compassionate presence and a deep commitment to supporting the emotional well-being of children, teens, and young adults. Her clinical experience spans a range of settings, including elementary and middle schools, community mental health agencies, and early childhood education centers, where she has provided therapy and mental health consultation.
Jennifer has supported clients navigating anxiety, grief, trauma, and challenges in family and peer relationships. She offers a collaborative, strengths-based approach and works to create a safe, affirming space where clients feel seen, heard, and empowered in their healing process.
Grounded in a family systems perspective, Jennifer draws from narrative therapy, solution-focused therapy, and cognitive behavioral therapy (CBT), tailoring her approach to meet each client’s unique needs and goals. Her integrative style honors each person’s story while fostering meaningful growth and change.
Jennifer earned her bachelor’s degree in child and adolescent development from San Jose State University and her master’s degree in psychology, with an emphasis in marriage and family therapy, from Brandman University. She is currently earning hours toward licensure under clinical supervision.
Paige Anderson, AMFT
Associate Marriage and Family Therapist #137954
Paige is an associate marriage and family therapist who brings a gentle, attuned approach to her work with clients. She meets people where they are - whether they are navigating grief, relationship challenges, or a sense of disconnection from themselves - and offers a grounded, compassionate space to explore what’s present beneath the surface. Paige supports clients in developing new ways of coping and understanding themselves, gently guiding them toward greater insight and more intentional patterns of living.
Her approach is integrative and client-centered, drawing from a variety of therapeutic modalities depending on what feels most supportive in the moment. Paige incorporates somatic practices to help clients tune into the physical and emotional cues that may have been overlooked or dismissed. She believes the body holds essential wisdom, and that by reconnecting with that inner awareness, meaningful healing and transformation can unfold.
Paige earned her master’s degree in counseling psychology from John F. Kennedy University and is currently earning hours toward licensure under clinical supervision. She is committed to creating a safe, inclusive, and affirming space where clients can feel seen, supported, and empowered in their journey toward growth and self-discovery.
Selda Durak, ACSW
Associate Clinical Social Worker #123321
Selda is an associate therapist who brings empathy and a strong sense of purpose to her clinical work. Her approach is rooted in evidence-based practices—including Cognitive Behavioral Therapy (CBT), Acceptance and Commitment Therapy (ACT), and Motivational Interviewing—and shaped by a deep appreciation for each client’s unique experiences, strengths, and story.
Her journey into the field began as a behavior technician, where she supported children in developing emotional and behavioral skills. She went on to work with homeless women in Berkeley, an experience that reinforced her commitment to advocating for and supporting underserved communities. Since then, Selda has offered both therapeutic care and case management in a variety of settings, including an adult day health center and Kaiser Permanente. Most recently, she worked as a psychiatric social worker, providing support to older adults living with serious mental illness.
Selda’s clinical style is collaborative and strengths-based. She strives to create a safe, respectful space where clients feel truly seen and supported. She is especially passionate about working with individuals facing depression, anxiety, and PTSD, and approaches each therapeutic relationship with care, curiosity, and a commitment to meaningful growth.
She earned her master’s in social work from the University of California, Berkeley.
Jennifer Mellin, AMFT
Associate Marriage and Family Therapist #149082
Jennifer is an associate marriage and family therapist who brings warmth, presence, and curiosity to her work with clients. She meets people where they are - whether they are navigating anxiety, relationship struggles, or life with a chronic illness - and offers a compassionate, understanding space to explore their parts and alternate ways to self-advocate for their health. Jennifer supports clients in healing their internal system for personal relief and peace, and works with couples and families to improve communication and relationship dynamics.
Her approach to therapy is collaborative, non-judgmental, and person-centered. She believes that people have the resilience and inner knowledge of their own parts to make changes in their lives that bring a greater sense of harmony. She also believes that these changes happen sooner when clients have support and resources from a compassionate and committed professional. She blends Internal Family Systems, Gottman Method Couples Therapy, and Person-Centered Therapy, tailoring her approach to meet each client's unique needs and goals. Her goal is for my clients to feel heard, understood, supported, and educated through their work in therapy.
Jennifer earned both her bachelor's and master's degrees in counseling from Saint Mary's College of California, where she built a strong foundation in empathic, culturally responsive, and integrative approaches to therapy. She is committed to advocating for care that is compassionate, accessible, equitable, tailored to each individual, and provided with a multicultural lens.
Hiba Alghazi, AMFT, APCC
Associate Marriage and Family Therapist #152455
Associate Professional Clinical Counselor #18505
Hiba is an associate marriage and family therapist and associate professional clinical counselor who is fluent in both Arabic and English. She is passionate about supporting clients from diverse backgrounds and creating a safe, inclusive space where they feel heard, valued, and empowered. Her clinical approach is grounded in empathy, cultural sensitivity, and a deep respect for each person’s unique story.
She takes a person-centered approach, tailoring therapy to meet each client’s individual needs, goals, and lived experiences. Whether working with someone navigating anxiety, life transitions, relationship challenges, or identity exploration, she strives to foster a warm and nonjudgmental environment where meaningful growth can unfold.
Her work is rooted in evidence-based practices and guided by active listening, collaboration, and trust. She helps clients develop effective coping skills, build resilience, and reconnect with their inner strengths. At the heart of her work is a belief that healing happens in relationship—when people feel safe enough to be fully themselves and supported enough to move forward.
Grace Bolen, AMFT
Associate Marriage and Family Therapist #141906
Associate Professional Clinical Counselor #14728
Grace is an associate marriage and family therapist and an associate professional clinical counselor who approaches therapy with warmth, authenticity, and curiosity. Grace strongly believes that the therapeutic relationship is the foundation for reflection, growth, and change. Clients working with Grace will find a safe and supportive space to explore their inner world and develop a clear sense of self.
Grace has primarily worked with children and families in social services agencies and school-based mental health systems. Her experience includes individual, family, and group therapy using trauma-informed and strength-based approaches. Grace actively incorporates mindfulness, cognitive behavioral therapy, emotion-focused therapy, narrative therapy, and a variety of play-based modalities. She is experienced with trauma and stress disorders, anxiety and depression, as well as grief and relational challenges.
Grace earned her bachelor’s in psychology from Loyola Marymount University and earned her master’s in counseling from Saint Mary’s College of California, where she developed a deep commitment to multicultural practices and social justice.