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Meet Our Team

Shawn Giammattei

Shawn V. Giammattei, PhD

Dr. Shawn Giammattei (he/him) is the founder of Quest Family Therapy and is a licensed family psychologist in Northern California, who specializes in couple and family therapy with a focus on the treatment of gender incongruence in children, adolescents and adults, as well as lesbian, gay, bisexual and transgender couple and family issues.

Jill Rees

Jill Rees, PhD

Jill (all pronouns) is a licensed psychologist who has worked with Sonoma County teens, adults, partners, and families for over 20 years. With her collaborative and playful approach, Jill supports people to live more authentic lives. She loves to help people find their way to the change they are seeking, whether it is improving their mood, deepening their connection with themselves and loved ones, or finding and expressing their authentic selves.

Ki Willow

Kira/Ki Willow, AMFT, APCC

Kira/Ki Willow (ey/she/he/they) is a registered Associate Marriage and Family Therapist and Professional Clinical counselor, working under the supervision of Jill Rees, PhD. She has a passion for supporting transgender and non-binary people and their families. Her approach to therapy focuses on helping people feel seen and understood, supporting them in recognizing how their environment affects them and finding ways to make their lives work better for them.
Petra Janopaul

Petra Janopaul, AMFT & APCC

Petra (she/her) graduated with a Masters of Art in Counseling Psychology from the Wright Institute (Berkeley, CA). She is a Registered Associate Marriage and Family Therapist and a Registered Associate Professional Clinical Counselor, supervised by Shawn V. Giammattei, PhD.

Caitlin Casey

Caitlin Casey, ASW

Caitlin (she/her) received her master’s degree in Social Work from Boise State University and is a Registered Associate Social Worker supervised by Jill Rees, PhD. while working towards licensure. Caitlin’s clinical approach is rooted in social justice and equity, and supporting the LBGTQ+ community. Caitlin’s previous experience working with individuals and families in equine training taught her the value of compassionate individualized approaches, and she carries that lesson into her clinical work.
Kate Threlfall

Kate Threlfall, PhD

Dr. Kate Threlfall is a systemic therapist who supports client-led changes with a collaborative and integrative approach: blending evidence-based treatments (such as CBT, DBT, ACT, and EMDR), utilizing a narrative lens that is deeply grounded in a relational framework. Kate is a licensed psychologist supervised by Jill Rees, PhD. while working towards California licensure. Kate works with individuals, families, and their systems in a solution focused and strengths-based way. As a compassionate clinician providing gender affirming care is paramount. 

Lisa Richards

Dr. Lisa Richards, PsyD.

Dr. Lisa Richards (she/her) received her doctorate in clinical psychology, forensic track, from California School of Professional Psychology at Alliant International University. Dr. Richards is a member of the LGBTQ+ community and is also a certified LGBT-informed therapist by The Rockway Institute in San Francisco.

Villa Barrett

"Little" M Vila-Barrett, LMFT

Little (they/them) is a transgender rights advocate, transracial Indigenous adoptee from Colombia, a queer mixed-race person, community activist, and mental health advocate. Little has been working with young people in various levels of programming and community-based mental health roles for over 20 years.

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