Meet the Social Services Staff

specialty, compassionate counseling

Social Services Counseling Staff

The UHS Social Services Counseling staff provides compassionate, specialty counseling. Support services include alcohol and other drugs, chronic medical conditions and new diagnoses, eating disorders and body image, medical withdrawal administration, nutrition, pregnancy resources and referrals, relationship violence, stalking, sexual health, sexual violence, and victims of crime.
Our counselors provide education, counseling, advocacy, referrals, and assistance with academic, financial and related issues that may arise as a result of the above. 


Justin Castello, PhD

Licensed Psychologist

Pronouns: he/him/his

Justin Castello, PhD, is a Licensed Clinical Psychologist within UHS Social Services where he's served Berkeley students since 2016. He provides individual and group counseling on alcohol and other drug use and related mental health concerns from Harm Reduction Therapy prospective. He also supports students who have survived trauma including sexual violence, intimate partner violence, and stalking and harassment, as well as those who have caused related harm. Justin's work with Berkeley students is very client-centered, tailored to their needs, collaborative, and respects their self-determination.

Prior to joining UHS, Justin was the program/intake coordinator and a harm reduction psychotherapist at The Harm Reduction Therapy Center (a nonprofit with community programs and private practices in the SF Bay Area) for 8 ½ yrs. He's provided therapy (individual, couples, family, and group) in many settings including The Homeless Youth Alliance for transitional aged youth in the SF Haight, E.C. Reems K-8 Charter School in East Oakland, Hospitality House/a community program in the SF Tenderloin, and Pretrial Diversion of SF County. Justin has also provided therapy for people in a locked acute mental illness facility, a social rehabilitation home, and in SF and East Bay private practice offices. He's presented workshops and trainings on Harm Reduction and Harm Reduction Therapy Alcohol and Other Drugs Group facilitation and has over 15 years of experience in the field.

Clinical Interests: Harm reduction therapy, alcohol and other drugs counseling, trauma counseling, couples and family counseling, multicultural/intersecting identity issues, and LGBTQ+ issues.

Maayan Greene, LCSW

Licensed Clinical Social Worker 

Maayan Greene joined the UHS SOS team in 2013. She received her MSW from UC Berkeley. Maayan also currently works in private practice and at UCSF Benioff Children's Hospital as a psychiatric social worker. She enjoys swimming and hiking in her spare time.

Clinical Interests: Eating disorders, trauma issues, healthy relationships, identity development, mindfulness practices (including MBCT and DBT techniques), depression and anxiety, and wellness and self-care.
Tiffany Hsiang Lin, LCSW

Tiffany Hsiang Lin, LCSW

Licensed Clinical Social Worker

Tiffany Hsiang Lin first joined UC Berkeley as a student, receiving her BA in Ethnic Studies and Sociology. She then went on to earn her masters degrees in Social Work at Columbia University and Social Science at University of Chicago. Tiffany returned to UC Berkeley in 2015 as the first dedicated Confidential Advocate at the PATH to Care Center. She's also part of the UHS Transgender Care Team. In her spare time, Tiffany enjoys knitting, cooking, jigsaw puzzles, and video/board games.

Clinical interests: trauma (EMDR trained), sexual/intimate partner violence, LGBTQ care, vicarious trauma and burnout, identity development, family systems, social justice, and multicultural/intersectional counseling.

Shanta Jambotkar, LCSW

Shanta Jambotkar, LCSW

Licensed Clinical Social Worker 

Pronouns: she/they

Shanta Jambotkar, LCSW, has worked at UHS Social Services since 2016. She self-identifies as a South Asian American, queer, cis-woman of color. Her social work education at the University of Michigan is blended with clinical training about body, mind, and spirit healing after trauma. Shanta is a social worker, psychotherapist, educator, and organizational consultant. A primary focus of her practice is to decolonize wellness by creating community and accessibility to healing for BIPOC. Her services are holistic, cultural, and indigenous informed to support communities experiencing intersectionality, and queer and trans people enduring adversity. Shanta is honored to witness and support students to access material resources, build self awareness and insight, and find pathways toward calm, purpose, and joy.

Clinical Interests: Healing after trauma, EMDR treatment, sexual violence and intimate partner violence survivorship, health conditions, LGBTQI, non-binary and BIPOC women, immigrant and next generation SSWANA communities.

Raquel Castellanos Miller, LCSW

Assistant Director of Social Services

Erin O'Connor LCSW

Erin O'Connor, LCSW

Licensed Clinical Social Worker

Pronouns: she/her/hers

Erin O’Connor, LCSW, joined UHS in 2020 as a Trauma and Health Concerns Clinical Social Worker. She previously worked as an outpatient therapist and trauma specialist at a community non-profit outside of Detroit, MI. Erin received her BA in Psychology from Michigan State University and her MSW from Wayne State University. She is nationally certified in Trauma-Focused Cognitive Behavioral Therapy (TF-CBT) and the Trauma-Conscious Yoga Method (TCYM) and has advanced training in Mindfulness-Based Cognitive Therapy (MBCT). Erin has traveled to five continents and enjoys yoga, hiking, writing, baking desserts, and playing board games.

Clinical Interests: Trauma, sexual and relationship violence, mindfulness, mind-body healing, chronic illness, body image, disordered eating, EFT Tapping, Muslim mental health.

Karen Tsai, LCSW

Licensed Clinical Social Worker 

Pronouns: she/her/hers

Clinical interests: Trauma-informed counseling, psychodynamic psychotherapies, multicultural and social-justice oriented counseling, mind-body-spirit wellness.

Robin Walley, LCSW

Licensed Clinical Social Worker 

Interim Post-MSW Fellowship Coordinator

Pronouns: she/her/hers

Robin Walley, LCSW, joined the Social Services team in 2003. She received her MSW from UC Berkeley and her BA in Psychology from Pomona College. As the alcohol and other drug counseling team lead, Robin has been a steadfast advocate for a cross-UHS harm reduction orientation and motivational interviewing-informed practice, which has impacted the language used at UHS to talk about alcohol and other drugs, the services provided to students, and how UHS collaborates with campus and community partners.  
Clinical Interests: Alcohol and other drugs counseling, harm reduction, motivational interviewing, LGBTQ+ experiences, polyamory and consensual non-monogamy, kink/BDSM, self-injury, sexual and racial identity development, and identity intersectionality.
Hez Wollin, LCSW

Hez Wollin, LCSW

AOD and Trauma Specialist

Pronouns: they/them/theirs

Hez Wollin LCSW joined Social Services and focuses on AOD and Trauma. Hez received their MSW from Smith College School for Social Work. Hez is also in the process of becoming a Somatic Experiencing Practitioner. They have many years of experience working with LGB and transgender communities and have led trainings on providing gender-affirming care for mental health providers. Hez was formerly an adjunct instructor at the University of Washington School of Social Work and a clinician at UCSF Alliance Health Project. Hez aims to provide trauma-informed, holistic, embodied support while holding a decolonizing lens. 

Clinical Interests: relational-cultural therapy, healing from PTSD and complex trauma, attachment, somatics, LGBTQ+ and gender-affirming care, perinatal mental health, undocumented communities, harm reduction, intersections of identity, and mental health/substance use.  In their spare time, Hez enjoys reading fiction, making pottery, riding their bike, and running around after their toddler.

Additional languages spoken: Spanish

1st YearPost-MSW Clinical Social Work Fellows

A Post MSW Clinical Social Work Fellow is Pictured

Erin Power, MSW

Erin (she/her) graduated from UC Santa Barbara with a BA in Sociology and minor in Clinical Psychology. Erin went on to pursue her Master's of Social Work at Boston College with an emphasis in Clinical Mental Health.

Prior to Cal, Erin worked in the hospital and higher education settings. Erin provided psychotherapy within Primary Care-Integrative Behavioral Health at Boston's largest urban, Level I trauma center hospital. Erin worked with individuals navigating their medical conditions in a diverse population set varying from Bostonian natives to immigrant refugees. Erin's work included a variety of roles: assisting in the diabetes and depression clinic, depression remission and recovery clinic, administering risk assessments, and providing clients with additional resources.

Erin also worked in the higher education setting providing counseling and case management services to university students. Erin provided support to students returning from medical and personal leave in their transition back to campus. Erin also has experience working at the Koegel Autism Center at UC Santa Barbara working with older adolescents (late teens, college students) with autism focused on building social skills, life skills, and managing mental health challenges.

Erin identifies as a multi-ethnic, Filipina American who enjoys travelling and exploring the outdoors. In her free time, you can find Erin taking dance classes, going to thrift stores, attending live music events, or painting at home with a cup of tea.

Clinical interests: multicultural counseling, intersecting identities, identity development, addressing systemic barriers in institutions, health conditions, eating disorders, self-esteem, anxiety, depression, grief, and creative expression.

A Post MSW Clinical Social Work Fellow is Pictured

Sabrina Van Zuiden, MSW

Sabrina (she/hers) attended UC Berkeley as an undergraduate, earning her B.A. in Social Welfare and Sociology with a minor in Hispanic Languages, Linguistics and bilingualism. She went on to graduate with her Master of Science in Social Work from Columbia University, where she focused her clinical attention on working with LGBTQIA+ clients, students, and survivors of trauma.

Previously, Sabrina worked in her hometown of San Diego, CA as a Sexual Assault and Domestic Violence Counselor focused on increasing prevention, outreach, and advocacy resources for LGBTQIA+, unhoused, systems-impacted, and transitional-aged youth. She regularly provided training for professionals on the topics of Introductions to Intimate Partners, Sexual, and Teen Relationship Violence, Human Trafficking, Empowerment, and Trauma-Informed Care, Cultural Considerations, Power/Privilege/Oppression, Working with LGBTQIA+ Survivors, and Resilience Skill Building. Sabrina also regularly facilitated groups with community members on the topics of Healthy Relationships, Consent, Media and Porn Literacy, Unpacking Gender Norms, Jealousy, Communication, Identity Exploration, Anger, Safety with Technology, and Resilience Skill Building.

Sabrina approaches healing work by understanding the relationship that exists between individuals, our communities, and the systems we are raised within. Her professional framework is informed by and continues to develop within the values of anti-oppression, anti-racism, decolonization, transformative justice, disability justice, reproductive justice, body inclusivity, harm reduction, gender equity, and sexual liberation. A few of her clinical interests include mindfulness, somatic-based practices, trauma and survivorship, BIPOC and LGBTQIA+ experiences, intersectional identity exploration, sex therapy, and community-based approaches.

Sabrina is a queer, multiracial Filipina-American who loves sunshine, karaoke, and her cat, Steven. When not at work, you might find her scoping out thrift stores, growing her vinyl record collection, or taking in a view of the sunset.

2nd Year Post-MSW Clinical Social Work Fellows

KG Gehrich, MSW

KG Gehrich (she/her), received her MSW from the University of Montana, her MA in Intercultural Youth and Family Development from the University of Montana, and her BA in Psychology from Ohio University.

She has worked for the last 12 years in various nonprofits, including at a Child Advocacy Center (CAC), where she advocated for children who experienced harm and supported their caregivers, and at the University of Montana's Student Advocacy Resource Center (SARC), where she provided counseling and advocacy to students who experienced identity-based harm including sexual violence, intimate partner violence, stalking, and harassment, as well as gender identity discrimination and racism.

KG believes the work that people do to process and make meaning from their experiences is sacred and beholds their passages through the heartbreaks and celebrations of life with great reverence. She enjoys employing somatic approaches, mindfulness, and internal family systems/parts work into her practice. She is passionate about social justice; abolition, restorative justice, harm reduction, tribal sovereignty, and reproductive justice inform her work with students. She believes in bell hooks’ assertion that “rarely, if ever, are any of us healed in isolation. Healing is an act of communion.”

KG identifies as queer and pansexual, and finds her spiritual home in the outdoors. Soccer was a near-daily part of her life until a devastating injury in 2019. Now, she is learning to harness her body as a resource for resiliency. KG loves to travel and try new foods. She feels most invigorated and connected while hiking and trail running among natural landscapes that make her feel small. She enjoys live music, avidly listens to podcasts and watches documentaries, and awes at as many wildflowers as possible.

Clinical interests: trauma, attachment, LGBTQ+ identity development, spirituality, aging, children and families, and holistic healing and wellness.

Jennifer Tai, MSW

Jennifer Tai, MSW

Jennifer Tai, MSW, ASW, is a 1st-year Post-MSW Clinical Social Work Fellow. She received her BA in Communication Studies and Child and Adolescent Development, with a minor in Psychology at San Jose State University. She received her MSW and PPSC (Pupil Personnel Services Credentials) from San Jose State University as well.

Prior to joining UHS, Jennifer interned at the Department of Family and Children’s Services within the foster care and adoption units. She also has experience as an academic coach at Pivotal, a nonprofit that supports foster youth in high school and higher education settings. Jennifer also has experience in school social work settings within the Berryessa Union School District and East Side Union High School District. There, she provided mental health counseling and group counseling sessions to students at Brooktree Elementary along with students at Andrew Hill High in the Emotional Disability/Special Education programs in therapeutic classroom settings.

Jennifer identifies as a former foster youth and first-generation Asian American. She has experience facilitating spaces for socio-emotional skills building, grief and trauma groups, and foster youth communities.

Jennifer’s clinical interests include trauma-informed care, holistic care, strengths-based therapy, social justice, intimate partner violence and sexual assault, intersectionality, foster youth identity, API/Asian American identity, grief counseling, women of color’s mental health and healing, PTSD, anxiety, and depression disorders.

Jennifer enjoys creative outlets such as making arts and crafts, watching musicals, and music, including attending music concerts. She also enjoys trying new food, especially dessert places, cooking, and exploring nature and beaches.

Registered Dietitians

The UHS Registered Dietitians provide medical nutrition therapy and nutrition counseling for any UC Berkeley student with nutrition-related health concerns.

Sarah Minkow, MS, RD

Sarah Minkow, MS, RD

Sarah Minkow joined UHS in 2017 as a clinical dietitian. She completed her BA in Psychology with a minor in Exercise and Health Science at UC Santa Barbara (2006) and her MS in Nutritional Science at California State University, Long Beach (2016). Sarah has a clinical interest in nutrition for disease prevention and treatment, mindful eating, and food security.

Toby Morris

Toby Morris, MS, RD

Lead Clinical Dietitian

Toby Morris has been the lead clinical dietitian for students at UHS since 2012. She received her BA in Communication Studies from UCLA, her MS in Nutrition from San Jose State University, and completed her dietetic training at UCSF Medical Center. Toby specializes in eating disorders and mindful eating. 

Social Services Administrative Staff

Kimberley Mims

Kimberley Mims

Medical Withdrawal & Academic Adjustments Resource Specialist

Kimberley Mims is the lead administrative specialist for Social Services. She has been at UHS for 25 years. Throughout her career, Kimberly has worked as a Certified Medical Assistant (CMA) in Primary Care and as an Administrative Assistant in Social Services. Her areas of specialty are medical withdrawals and academic adjustments. One of Kimberly's favorite aspects of her work is connecting with students who have mental and physical challenges, and seeing them overcome those barriers so that they can complete their education. She is dedicated, caring, and skilled, and is beloved by her team and clients. 

Kimberly's hobbies include gardening, walking, and hosting one of her homes for temporary housing to traveling healthcare professionals during the COVID-19 pandemic. She enjoys spending time with her family and friends, especially her son Terrell, granddaughter Avery, and grandson, Zakari.

Gerald Suarez headshot

Gerald Suarez

Administrative Assistant

Gerald Suarez joined the UHS SOS team in 2018. He previously worked at the Opiate Treatment Outpatient Program at UCSF-Zuckerberg San Francisco General Hospital. Gerald received his BS in Health Education (emphasis on Community-Based Public Health) from San Francisco State University. He is also a certified personal trainer (NASM-CPT). Gerald enjoys traveling to new places, being outdoors, and trying food from all different cultures (he’s a foodie)!

Additional languages: Tagalog