Meet Our Team
Dr. Gustavo Franza
I am a bilingual Spanish-speaking licensed psychologist in Phoenix specializing in diagnostic, forensic, neuropsychological, neurodevelopmental, and neurocognitive assessment across all age groups. I earned my Doctorate in Clinical Psychology from the Arizona School of Professional Psychology in 2012 and am the founder of Franza Psychological Services.
I conduct evaluations for family, DCS, criminal, immigration, and administrative courts, addressing a wide range of issues including competency, child custody, parenting capacity, mitigation, violence risk, guardianship, disability, diagnostic clarification, expert testimony, and pre-sentence evaluations. My professional background spans private practice, inpatient, and correctional settings, providing the breadth of experience necessary to deliver balanced and comprehensive assessments tailored to each case.
In addition, I work with an elite team of clinicians who provide therapeutic support in areas such as trauma, life transitions, and addictions. Our therapeutic services are highly individualized, designed to meet the unique needs of each client.
Dr. Christina Horner
I have over 10 years of experience providing psychological assessments and therapy for children, adolescents, and adults, and hold a doctorate in Clinical Psychology from Northern Arizona University. I am currently supervised by Dr. Gustavo Franza. I understand that seeking help can be challenging, and I strive to provide a safe and supportive environment as clients navigate difficult life circumstances.
I recognize that negative experiences can influence thoughts, emotions, and self-perception, sometimes leading to patterns and behaviors that affect many areas of life. I help clients identify and challenge these issues to create positive change. I work from a strengths-based approach and have found that collaboration with clients often yields the best results. While I cannot guarantee an easy journey, I assure clients that they will not be alone on their path to healing.
My areas of expertise include ADHD, trauma, anxiety, depression, PTSD, and addictions. I provide individual therapy and comprehensive psychological assessments for clients of all ages.
Dr. Leslie Montijo-Tai
I am a licensed psychologist in Arizona with over 15 years of experience supporting individuals of all ages, backgrounds, and life experiences in hospitals, schools, and community mental health clinics. I have conducted evaluations for autism diagnosis and collaborated with agencies such as Veteran Services and disability programs. I earned my doctorate in Clinical Psychology from the Arizona School of Professional Psychology at Argosy University.
My approach is warm and collaborative. If you’re feeling lost or overwhelmed, I’m here to help you organize your thoughts and emotions, regain confidence in yourself, and achieve lasting change.
In our sessions, I work with you at your own pace to reach your goals, in a space where you feel comfortable, heard, and supported, and where I gently challenge you when needed.
I offer empathy, cultural sensitivity, and respect, and work best with adults committed to their healing process and personal growth.
Dr. Cynthia Grunsten
I'm a licensed psychologist with extensive experience in neuropsychological, forensic, and psychoeducational assessment, as well as therapeutic interventions for children, adolescents, and adults. My professional background includes work in private practice, educational settings, and low-income schools, with specialized expertise in autism, ADHD, and learning disabilities. In addition to my clinical and educational work, I travel throughout Arizona conducting disability evaluations for the Department of Economic Security (DES) in partnership with the Social Security Administration.
I've also worked as a behavioral instructional specialist, registered behavior technician, and educator. Across these roles, I have remained dedicated to supporting and empowering families through accurate assessment, targeted interventions, and individualized guidance.
I'm committed to providing comprehensive psychological evaluations that lead to accurate diagnoses and effective treatment planning. My approach focuses on helping children and families gain greater self-understanding, build on their strengths, and develop healthier relationships. I believe in fostering resilience, creating authentic connections, and guiding individuals toward more fulfilling and balanced lives.
Stephen M. Sprague
(Doctoral Candidate)
I'm a doctoral candidate in Clinical Psychology with specialized training in comprehensive psychological and neuropsychological assessment for children, adolescents, and adults. With more than a decade of experience administering and interpreting cognitive, academic, personality, and developmental measures, I have worked across hospital, private practice, and educational settings. I earned my Master’s degree in Psychology from Arizona State University and am completing my Ph.D. in Clinical Psychology at Saybrook University.
My clinical expertise includes evaluations for autism spectrum disorder, ADHD, learning disabilities, traumatic brain injury, and complex psychiatric presentations. I am certified in the administration of the ADOS-2 (Modules 1–4, including the Toddler Module) and have advanced training in multiple diagnostic tools to support accurate and individualized treatment planning.
Outside of my professional work, I am a dedicated husband and father of two, which informs my compassionate, family-centered approach to assessment and care. I am committed to helping clients and their families understand their strengths and challenges and to providing clear, practical recommendations to support success.
Monica Iwabuchi
(Doctoral Candidate)
I’m a bilingual doctoral candidate in Clinical Psychology at Northern Arizona University. I earned my master’s degree in Clinical Psychology from Texas A&M University Corpus Christi in 2016.
I have experience conducting neuropsychological assessments in English and Spanish for children, adolescents, adults, and the geriatric population across medical settings, schools, and private practice. I also conduct immigration and citizenship evaluations, lead therapy sessions, and provide neurofeedback sessions. I am trained in EMDR, a therapy for processing trauma and distressing experiences. My research includes my dissertation, “Examining Sleep Disturbance in Bilingual and Monolingual Latinx Students at Hispanic-Serving Institutions.”
In addition to clinical work, I have mentored doctoral students and taught psychology courses, including General Psychology as an adjunct faculty member, Experimental Psychology as a laboratory instructor, and Cognitive Psychology and Learning and Memory as a supplemental instructor.
I was raised in Mexico and am a native Spanish speaker. As an adolescent, I moved to Texas, where I lived for 18 years, before relocating to Phoenix, Arizona, to advance my career in psychology. I am currently completing my internship in El Paso, Texas. My passion is providing psychological services to the Latinx population.
I am a member of the Texas Psychological Association, Arizona Psychological Association, and the National Latinx Psychological Association.
Marissa T.
Psychometrist
I’m a bilingual psychometrist with over four years of experience in neuropsychological testing and a total of seven years in medical settings. Over the years, I’ve had the chance to work with people of all ages, including children, teens, adults, and older adults, administering cognitive, behavioral, and emotional tests.
I grew up in Arizona, started my studies at Glendale Community College, and I’m now working toward my master’s degree in psychology at Arizona State University. I’m passionate about continuing to grow in this field and using evidence-based practices in my work.
Having lived in Arizona, Texas, New York, New Mexico, and New Jersey, I value the opportunity to connect with people from diverse backgrounds. What matters most to me is making sure every patient feels comfortable and supported during the evaluation, while providing clear, reliable results that truly guide treatment and promote well-being.
