Greater Wyoming Big Brothers Big Sisters, headquartered in Laramie, provides children facing adversity with strong, enduring, professionally supported one-to-one relationships with adult mentors across Wyoming. The agency runs branches in Cheyenne and Casper and offers community-based and site-based mentoring. Steve Hamaker serves as CEO, and total revenue was about $1.6 million in 2024. Website bbbswyo.org.
The agency matches a child (a Little) with a vetted volunteer adult mentor (a Big) in a one-to-one relationship supported by professional staff. It describes its work as providing children facing adversity with strong and enduring, professionally supported one-to-one relationships that change their lives for the better.
Greater Wyoming Big Brothers Big Sisters offers two models: community-based matches, in which volunteers are paired with children by shared interests and personalities and meet on their own schedule, and site-based matches, in which volunteers meet children at school during lunch, recess, or before and after school.
Wyoming is the least populous state, with communities spread across vast distances, which makes statewide mentoring a logistical challenge. Greater Wyoming Big Brothers Big Sisters meets it by operating from Laramie with branches in Cheyenne and Casper, the state's two largest cities.
That structure lets a single statewide agency support matches in the population centers along the Interstate 25 and Interstate 80 corridors, where most Wyoming residents live.
Steve Hamaker serves as CEO, leading the agency from its headquarters at 1010 South 6th Street in Laramie. Total revenue was about $1.6 million in 2024.
The agency relied on government grants for more than 80 percent of its revenue in 2024, a funding mix that reflects how rural mentoring agencies often depend on public support, and one reason individual and corporate giving matters for diversifying its base.
To become a Big, visit bbbswyo.org. Volunteers complete an application and screening process, then are matched with a Little and supported by agency staff throughout the relationship.
Both community-based and site-based options are available, so volunteers can choose a model that fits their schedule, whether meeting a Little independently or during the school day. The branches in Cheyenne and Casper make it possible for volunteers in those areas to find a local match.
Donations can be made at bbbswyo.org. The agency is a 501(c)(3) organization, so gifts are tax-deductible. Because government grants make up most of its revenue, individual and corporate gifts help diversify funding and sustain match support.
Gifts that fund match support, the staff time behind each match, help keep relationships safe and effective across a state where staff travel long distances to support matches.
Wyoming has youth-serving organizations including Boys and Girls Clubs and community programs. For one-to-one, professionally supported mentoring statewide through the national Big Brothers Big Sisters network, Greater Wyoming Big Brothers Big Sisters is the state's agency.
Its statewide structure, with branches in the two largest cities, is a distinguishing feature in a state where distance makes coordinated youth services hard to sustain.
Last updated June 2026. Greater Wyoming Big Brothers Big Sisters headquarters (1010 South 6th Street, Laramie), CEO Steve Hamaker, Cheyenne and Casper branches, community-based and site-based programs, 2024 total revenue (about $1.6 million) and reliance on government grants for over 80 percent of revenue from the agency (bbbswyo.org) and ProPublica Nonprofit Explorer (EIN 51-0188774). We are not affiliated with Greater Wyoming Big Brothers Big Sisters and receive no compensation for this listing. Spotted an error? [email protected]
More Wyoming and youth-mentoring resources