Big Brothers Big Sisters of Oklahoma (BBBSOK) is a statewide youth-mentoring agency headquartered in Tulsa, with service offices in Bartlesville, Oklahoma City, Norman, Shawnee, and Stillwater. In June 2024, BBBSOK was named Large Agency of the Year at the Big Brothers Big Sisters of America National Conference, recognition that places it among the strongest agencies in the national network. Melissa Ramirez serves as CEO. Website bigoklahoma.org.
BBBSOK matches a child (a Little) with a volunteer adult mentor (a Big) in a one-to-one relationship supported by professional staff. The agency is the leading youth-mentoring organization in Oklahoma, with measurable outcomes in educational attainment, avoidance of risky behaviors, and improved self-confidence among the youth it serves.
Operating statewide, BBBSOK delivers mentoring from a network of offices so that children and volunteers across both metropolitan and smaller communities can take part.
In June 2024, BBBSOK was named Large Agency of the Year at the Big Brothers Big Sisters of America National Conference. The award recognizes top performance among the largest agencies in the national network, across program quality, growth, and outcomes.
National recognition of that kind signals that BBBSOK's statewide scale is matched by program quality, a combination that few agencies achieve at once.
BBBSOK is headquartered in Tulsa and runs service delivery offices in Bartlesville, Oklahoma City, Norman, Shawnee, and Stillwater, in addition to Tulsa. That network lets a single statewide agency reach children across Oklahoma rather than concentrating only in the two largest cities.
Covering a largely rural state from several hubs is a deliberate strategy: it puts staff and matches within reach of families in college towns, smaller cities, and the surrounding communities, not just the Tulsa and Oklahoma City metros.
As the statewide BBBS agency, BBBSOK enrolls children from communities across Oklahoma and matches them with screened adult volunteers. Melissa Ramirez serves as CEO, leading the agency's statewide operations.
Demand for mentors typically exceeds the supply of screened volunteers, so the agency continually recruits Bigs across its service areas, especially in the smaller cities served by its regional offices.
To become a Big, visit bigoklahoma.org. Volunteers complete an application and screening process, then are matched with a Little and supported by agency staff throughout the relationship.
With offices in six cities, BBBSOK makes it possible for volunteers across the state to find a match and the local support that goes with it.
Donations can be made at bigoklahoma.org. BBBSOK is a 501(c)(3) organization, so gifts are tax-deductible. Corporate partnerships, foundation grants, and individual giving fund the statewide mentoring work.
Gifts that fund match support help the agency keep relationships safe and effective across its statewide network.
Oklahoma has Boys and Girls Clubs and other youth organizations that reach children through group programming. For one-to-one, professionally supported mentoring statewide, BBBSOK is the leading agency, recognized nationally as 2024 Large Agency of the Year.
Its statewide office network is a distinguishing feature, letting it serve communities well beyond the two largest metros.
Last updated June 2026. BBBSOK as 2024 Big Brothers Big Sisters of America Large Agency of the Year, statewide structure (Tulsa headquarters; offices in Bartlesville, Oklahoma City, Norman, Shawnee, Stillwater), and CEO Melissa Ramirez from BBBSOK (bigoklahoma.org); EIN 73-1226237 from Candid and ProPublica Nonprofit Explorer. We are not affiliated with Big Brothers Big Sisters of Oklahoma and receive no compensation for this listing. Spotted an error? [email protected]
More Oklahoma and youth-mentoring resources