Square One Adds Leader for Child Mental Health
Human-services operators in Springfield will see the agency expand early childhood mental health supports under new clinical leadership.
Updated on Nov. 6, 2026 in People
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Square One has welcomed Stephanie Marrero-Wilson as vice president of Support Services, where she leads its Cornerstone Therapy Center and oversees a team of clinicians and support staff. The hire supports the agency's expansion of mental health offerings for children from infancy through age 12.
Why it matters
The appointment reflects the growing need for early childhood mental health supports, and it places clinical leadership and staff training at the center of the agency's expansion. For operators of human-services and healthcare organizations, it illustrates how leadership hires are being used to build out capacity in a specialized service line.
Marrero-Wilson brings more than 15 years of children's behavioral health experience to the role, and Square One, founded in 1883, now serves children from infancy through age 12. The Cornerstone Therapy Center, introduced in 2019 with LEGO Foundation funding, is the program she leads.
The players
Square One
Springfield-based agency founded in 1883 that provides mental health and developmental supports to children from infancy through age 12.
Stephanie Marrero-Wilson
Licensed clinical social worker with more than 15 years of children's behavioral health experience, now serving as vice president of Support Services at Square One.
Behavioral Health Network
Provider network where Marrero-Wilson most recently served as an intensive care coordination clinical supervisor.
LEGO Foundation
Philanthropic organization that provided initial funding for Square One's Cornerstone Therapy Center in 2019.
The details
Marrero-Wilson oversees the agency's clinical and developmental supports and is tasked with strengthening staff training, family partnerships, and community collaboration. She most recently served as an intensive care coordination clinical supervisor at Behavioral Health Network, and she is a licensed clinical social worker and graduate of Westfield State University. She also founded Beneath the Healing LLC in 2022.
Timeline
Square One was founded in 1883.
Cornerstone Therapy Center was introduced in 2019 with initial LEGO Foundation funding.
Beneath the Healing LLC was founded in 2022.
Marrero-Wilson's hire was announced on November 6, 2026.
Market Landscape
The appointment extends the Cornerstone Therapy Center model that Square One launched in 2019 with LEGO Foundation funding. It signals the agency's push to build leadership capacity around early childhood mental health as demand for those supports grows.
Human-services operators should watch how Square One structures clinical supervision and family partnerships as it expands services to younger children. Organizations competing for qualified clinical talent may find that experienced children's behavioral health leaders are being recruited into expanding programs.
The takeaway
Expanding a specialized service line often starts with a senior clinical hire, so operators planning growth should map where leadership capacity is needed before adding programs. Track how Square One reports on enrollment and staffing as its early childhood offerings develop.
Further reading
For more on leadership moves at local organizations, see People in our Springfield business coverage.
Source note: This article includes information reported by BusinessWest.
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