SEL instructor
Executive Functioning Specialist
“My mission is to meet every child where they are, using empathy, creativity, and connection to help them feel seen, supported, and empowered to succeed.”
Highlighted Services: Executive Functioning Coaching, Multidisciplinary Evaluations, Social-Emotional Learning Sessions
Brielle Mussomeli, M.Sc. is a School Psychologist at San Diego Kids First. She brings heartfelt dedication to helping children grow academically, emotionally, and socially. She earned her Master of Science in School Psychology from National University and holds a Bachelor’s Degree in Psychology from San Diego State University. With a strong foundation in both education and hands-on experience, Brielle is known for her empathetic, creative, and child-centered approach.
Before pursuing graduate studies, Brielle worked as a teacher’s assistant at Silver Gate Elementary, supporting students in one-on-one and small group settings. She worked closely with students with learning disabilities, which sparked her passion for School Psychology and her desire to advocate for children’s diverse needs. She went on to complete her School Psychology internship with Poway Unified School District, where she worked with both elementary and middle school students. During this time, she conducted comprehensive psychoeducational assessments for students with Specific Learning Disabilities, ADHD, Anxiety, Autism Spectrum Disorders, Behavioral Challenges, and those with other mental health or neurodevelopmental conditions.Brielle’s prior experience also includes working in a school counseling setting utilizing trauma-informed and solution-focused modalities, and collaborating with families and school teams to support the development of IEPs and 504 Plans.
At San Diego Kids First, Brielle provides individual skill-building sessions with children and teens focused on tailored social, emotional, and behavioral goals. She provides parent coaching and support, and collaborates with the school team at the family’s request. She also conducts multidisciplinary evaluations in conjunction with the clinical team at San Diego Kids First . She is committed to building trusting relationships and creating safe, supportive environments where students feel heard and valued, and can thrive socially, emotionally, and academically.
Brielle also brings a vibrant creative background to her work. A lifelong performer, she spent nearly a decade as a vocalist and live entertainer at LEGOLAND California. Her background in music and the performing arts helps her connect with youth through play, creativity, and emotional expression. Whether using music-based strategies or simply infusing joy into her sessions, Brielle blends her clinical training with her natural ability to engage and inspire young people. In her free time, she enjoys spending time with her family, yoga, hiking, singing, and cheering on the San Diego Padres as a member of the Pad Squad.
What Others Say About Us
I would highly recommend San Diego Kids First. They are caring and knowledgeable and have helped the many clients I have referred to thrive academically and socially.
Dr. Deborah Pontillo and her team are a rare gem in the field of child and adolescent psychology. As the founder of Kids First, she has created a concierge-style, full-service practice that offers truly comprehensive care. From psychological testing and diagnostic evaluations to individual therapy, parent coaching, and school consultations, her team addresses the full range of developmental, emotional, and behavioral needs with an exceptional level of professionalism and warmth.
Dr. Pontillo stands out not only for her clinical expertise, but also for the care and attention she brings to every family she supports. The practice is highly personalized — families are never treated as just a number. She works closely with parents, schools, and other professionals to coordinate care, ensuring that each child receives thoughtful, tailored interventions that evolve with their needs. Kids First is the only practice I recommend in the San Diego area. Dr. Pontillo and her team are trusted, skilled, and truly invested in helping children and families thrive.
They are truly experts and so kind! My son was struggling in middle school, and they supported us through that experience. I love that they offer a full continuum of care for families from parenting, child and teen therapy, as well as support with educational struggles and will work with the schools to help advocate for your child. I highly recommend them!!!
I highly recommend San Diego Kids First as a resource for your child’s mental health! Their intake process is easy and seamless and they have numerous skilled therapists to choose from to meet your child’s needs. This is my primary place to refer children and families and I have only heard great feedback about this group. I have also seen the positive change that has taken place in my client’s children as a result of getting services from them!
We have trusted San Diego Kids First with our family for the last five years. I have two neurodivergent children that both received diagnoses and therapy with Dr. Pontillo and Dr. Gamboa. My daughter has an amazing connection with Dr. Pontillo. Through her sessions we were able to help sleep patterns, adjust behaviors, and practice self-love. I appreciate that we can receive holistic care with educational and coaches on the team. We have had Dr. Rivet help us create a household that works well for us, and the Educational Specialist, Ms. Sheri Friedman was able to help my daughter move from well under grade-level to thriving above grade-level in one summer. Sheri was also an incredible advocate for us through the IEP process. This entire team is incredibly knowledgeable, patient and understanding. We are forever grateful that they are in our lives. ADHD and ASD can feel so overwhelming and I couldn’t have done it without Dr. Pontillo and her team.
Dr. Pontillo is an exceptional, and one-of-a-kind child psychologist. I have referred many children of my patients to Dr. Pontillo and she has always given them the best care and attention. Referring a patient to another professional is a big responsibility. I always look for a colleague who is efficient, professional, experienced and one who is able to come up with a clear diagnosis. I keep referring to Dr. Pontillo because of her expertise, efficiency and especially her warm and caring personality that is extremely necessary when dealing with children. I very highly recommend Deborah Pontillo, Ph.D as a child diagnostician, developmental and behavioral specialist, and therapist.
I am a general pediatrician with a special interest in ADHD, spending about 20% of my clinical time caring for ADHD patients. I have known Dr Pontillo since 2005 and have an enormous respect for her clinical skills and insights. She is my “go to” psychologist for more complicated developmental issues and for diagnosis of subtle high functioning disabilities. Dr. Pontillo’s interest in her patients and her ability to clearly delineate developmental problems allows parents to move forward with establishing a treatment plan. She is an invaluable resource to the San Diego Pediatric community.
Dr. Gamboa is absolutely phenomenal. She’s warm, patient, and so accommodating. She really makes the experience feel so comfortable. My daughter wasn’t intimidated in the slightest. Her expertise is top notch and I wouldn’t trust anyone else – truly! Thank you Dr. Gamboa!
I’ve been referring my patients to Dr. Pontillo for the past several years with the utmost confidence that she will care and understand their developmental needs. Dr. Pontillo always provided them with a balanced and age appropriate intervention to help not only the child but the family as a whole.
I’ve known Dr. Deborah Pontillo for many years and have always been impressed by her deep expertise, professionalism, and dedication to the families she serves. She has over 20 years of experience in the field and also serves on the voluntary faculty at UCSD’s Department of Psychiatry, where she helps train and mentor future clinicians.
Her practice, San Diego Kids First, is an invaluable resource for our community – an interdisciplinary team of professionals focused on the developmental and behavioral health of children and teens. What really stands out is their collaborative approach — the team works closely together to understand each child and family from multiple perspectives, ensuring care that’s thoughtful, coordinated, and comprehensive.
As a colleague, I trust Dr. Pontillo and San Diego Kids First completely and have referred many children, teens, and families to her over the years. I know they will receive outstanding, compassionate, and well-integrated care.
As a clinical psychologist and owner of a company that provides similar services, I truly admire the work that SDKF does in the community. I refer clients to them frequently and with confidence. Dr. Pontillo has built a strong, compassionate, and multidisciplinary team that offers a wide range of services, including psychological testing, social skills groups, in-home therapy, and academic support. SDKF is a true gem in the San Diego community, and their dedication to helping children and families shines through in the quality of the work they do.
Dr Deborah Pontillo provided us with amazing service for our daughter when a teacher suggested she get evaluated for learning differences. Dr Pontillo’s treated us (my husband and myself as well as our daughter) with empathy, respect and professionalism. She is relatable and down to earth as well as brilliant. We were not prepared for the diagnosis our daughter received yet Dr. Pontillo helped us understand what it meant for us as well as what treatment/therapies were most appropriate. We took her recommendations and trust her so much that, 4 years later, we continue to trust Dr Pontillo with her thoughts and suggestions. We highly recommend Dr Pontillo, would never go anywhere else for pediatric psych evaluations and her services were worth every cent.
I am so grateful for Dr Pontillo. She is very bright, compassionate and thorough. She helped evaluate my daughters and guide us in the direction to support them the way they needed. I can’t say enough how wonderful she is.
Immersed in a community of families that put their children above all else, I have been lucky to meet and learn from Dr. Pontillo and am proud to call San Diego Kids First the only place I refer. Dr. Pontillo expresses an impassioned energy for being a well-respected leader in child psychology and it’s that energy that I want in a psychologist for my family and friends. Parenting decisions, I have found, require an artful and nimble approach and having the ability to use San Diego Kids First makes me feel at ease among the many uneasy parenting decisions we all must make.