named programs · 5 · from sources
What they call their work
Annual United Nations Day
Signature event during the Commission on the Status of Women featuring student briefings, thematic workshops, and networking with UN dignitaries, promoting awareness and global engagement for youth.
Health and Girl Power Forum
Annual forum addressing health disparities and empowerment for women and girls of color, including health screenings, education, and advocacy initiatives.
Maama Kit Campaign
Safe birthing initiative in partnership with the World Health Organization and community partners to provide maternal health kits for women in Africa.
STEAM Camp and Year-Round Academy
Multi-faceted program for high school girls focusing on Science, Technology, Engineering, Arts, and Math fields, providing advanced instruction, role model exposure, leadership development, and college preparation, which has evolved into a year-round academy.
Still I Rise Research Initiative
Baseline research report on Black women and girls in Westchester County focusing on STEM, maternal health, juvenile justice, and economic prosperity, developed in collaboration with over 25 stakeholders.
activities · 15 groups
What they do
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Women's Leadership & Career Advancement Networks 2 activities
- Hosts health and empowerment forums for women and girls of colorOrganizes the Health and Girl Power Forum and an annual health symposium featuring a vendor marketplace, both signature events focused on health, empowerment, and advocacy for women and girls of color, established in Yonkers, NY.
- Provides equity and professional development resourcesOffers downloadable resource guides on equity and inclusion and facilitates access to salary negotiation and pay equity workshops through a partnership with the American Association of University Women (AAUW).
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Hands-On STEM Education Programs 2 activities
- Operates STEAM Academy and year-round youth programsRuns a year-round STEAM Academy and annual STEAM Camp for girls of color, now in its 16th year, offering advanced instruction, leadership development, field trips, and role model exposure; evolved from a decade-plus summer STEM camp into sustained programming.
- Sponsors annual STEM camp for Black and Latina girlsHosts an annual STEM camp for Black and Latina girls in partnership with Academic Pathways, providing immersive educational experiences in science, technology, engineering, and math.
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Local High School Scholarship Programs 1 activity
- Conducts fundraising and scholarship programsOrganizes fundraisers and awards student scholarships as part of its ongoing programming to support youth development and education.
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Professional Networking Events 1 activity
- Facilitates entrepreneurship and professional networkingOrganizes an entrepreneurship network and mixer events to foster collaboration, idea-sharing, and business development among women entrepreneurs and leaders of color.
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Youth Global Leadership & Model UN Programs 1 activity
- Hosts annual United Nations Day for youthOrganizes an annual United Nations Day event to promote global awareness and civic engagement among youth.
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Community Festival & Event Production 1 activity
- Hosts cultural celebrations including KwanzaaHosts an annual Kwanzaa celebration as part of its cultural programming, first held at the Yonkers YWCA, to promote community and heritage.
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Regular Membership Meetings 1 activity
- Hosts quarterly membership meetingsConvenes quarterly themed membership meetings as part of ongoing programming to engage members and stakeholders in mission-aligned activities.
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Women's Empowerment and Leadership Development 1 activity
- Leads public awareness and advocacy campaignsProduces mission-driven public awareness campaigns and signature events through volunteer committees to advance advocacy on issues affecting women and girls of color.
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Community Capacity Building & Leadership Networks 1 activity
- Operates organizational membership and collective impact programOffers a membership program for organizations and businesses to engage in collective impact workgroups, programs, and events that advance equity and community development.
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Professional Conference & Symposium Organization 1 activity
- Organizes International Day of the Girl ConferenceHosts the International Day of the Girl Conference, bringing together young women from Westchester and the Hudson Valley for civic engagement, wellness, cultural celebration, and scientific exploration.
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Youth Cultural and Educational Travel Programs 1 activity
- Partners on international STEM education initiativesSponsored STEM camps in Westchester for students and teachers from Lagos, Nigeria, and collaborated on a STEM camp in Lagos with a local NGO partner, supporting international educational exchange.
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College Access and Success Support 1 activity
- Provides academic and career development programmingOffers student and parent workshops, college and career fairs, academic advocacy resources, and scholarship application support through long-standing collaborations with Academic Pathways and Dr. Angela Campbell.
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Maternal Health Fistula Prevention and Treatment 1 activity
- Runs Maama Kit Campaign for safe childbirth in AfricaLaunched and leads the Maama Kit Campaign in partnership with the World Health Organization and The Links Incorporated to raise funds and distribute over 3,000 safe birthing kits to women in Africa.
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Community Health Equity Initiatives 1 activity
- Runs health campaigns focused on Black maternal healthConducts a sustained health campaign to improve Black maternal health outcomes through public awareness, community engagement, and initiatives like the "Know Your Stats" program that promotes health screenings and tracking among women of color and their families.
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Uncategorized 1 activity
- Conducts research on Black women and girls' outcomesConducted baseline research and published the "Still I Rise" report documenting conditions for Black women and girls in Westchester County across education, health, justice, and economic domains, building a coalition of over 25 stakeholders to support improvement efforts.
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financials · form 990 · fy2024
revenue
Total revenue$436K
Contributions & grants$277K64%
Program service revenue$7K2%
Investment income$00%
Other revenue$151K
expenses
Total expenses$288K
Program expenses84%
Admin / overhead16%
Fundraising0%
Salaries & benefits$0
Grants paid out$0
Largest expense lineProfessional Fees
balance sheet
Total assets$219K
Cash$89K
Investments$0
Liabilities$3K
Net assets$216K
Liquid reserves3.7 mo
6 years on record · 2019–2024 · YoY revenue +82.3%
leadership · form 990 part vii · fy2024
Who runs it
board members · 21
- Athena Dent — Board Director
- Brenda Bracey — Board Director
- Charmaine Golding — Board Member
- Cheryl Brannan — Founder President
- Chiatogu Onyewa — Board Director
- Darlene Russell — Board Director
- Deana Nelson — Board Director
- Dr Angela Campbell EdD — Board Director
- Georgia Reid-Douglas — Treasurer
- Germaine Scott — Board Co-chairperson
- Ghilaine Clark — Board Director
- Gwen Parris — Board Director
- Jordanne Lewis — Board Director
- Kassandra Woody — Recording Secretary
- Lauren Morris — Board Director
- Millissa Bess MN MS OCN — Board Director
- Pamela Verette — Financial Secretary
- Rev Marcia White-Smith — Board Director
- Tinuke Colpa — Board Director
- Vera Cheek — Board Director
- Zelda Strong-Diaz — Board Co-Chairperson
relationships · 17
Who they work with
- Academic Pathways Partner — Partnership to deliver STEM camps for Black and Latina girls.
- Academic Pathways Partner — Trusted partner collaborating on student and parent workshops.
- American Association of University Women Partner — Collaborates on salary negotiation and pay equity workshops and resources
- Black Women leaders in business, government, education, health, faith based, and other key sectors in Westchester County Partner — Collaborates with Black Women leaders across multiple sectors in Westchester County through its community partner membership program.
- Dr. Angela Campbell Partner — Trusted partner collaborating on student and parent workshops.
- Kingdom Baptist Church Partner — Partnered with STSI on a three-year faith-based health initiative in Yonkers.
- New Rochelle High School Partner — Hosted a Sister to Sister International conference on Black maternal health and entrepreneurship.
- New Rochelle United Methodist Church Partner — Venue for the STSI Entrepreneurship Network & Mixer 2026 event.
- Obama White House Council on Women and Girls Partner — Collaborated with the Obama White House Council on Women and Girls starting in 2015 to advance initiatives for Black women and girls.
- State Farm Partner — Became a sponsor and partner of STSI’s STEM Camp program.
- Subomi Macaulay Partner — Nigerian-born board member and treasurer who supported the 2011 STEM Camp for Nigerian students.
- The Links Incorporated Partner — Collaborated on the Maama Kit Campaign to support safe birthing for women in Africa.
- United Nations Economic and Social Council Government — Holds Special Consultative Status with UN ECOSOC, enabling participation in global policy forums.
- Westchester Black Maternal and Child Center of Excellence Partner — Collaborates on initiatives related to Black maternal and child health.
- Westchester Children’s Association Partner — Collaborated to host the International Day of the Girl Conference at Manhattanville College.
- World Health Organization Partner — Collaborates with WHO on health campaigns and co-launched the Maama Kit Campaign for safe childbirth in Africa.
- bwgc2015@gmail.com Partner — Email point of contact for submitting "Count Me In" forms for the health initiative.
strategies · 3
How they approach the work
Named approaches extracted from this org’s sources. Where others share an approach, follow it to see the full set of orgs running it.
- Collective Impact Frameworkmethodology: collective_impactBy coordinating cross-sector stakeholders—including organizations, businesses, and communities—SISTER TO SISTER INTERNATIONAL amplifies its reach and effectiveness in improving outcomes for Black women and girls, because systemic change requires aligned goals, shared measurement, and mutually reinforcing activities across partners.
- Girl-Centered Empowerment through Holistic STEAMmethodology: holistic-stem-engagementBy integrating STEAM education with wellness, cultural celebration, and civic engagement, the organization fosters confidence, curiosity, and long-term leadership in Black girls and girls of color, because holistic development addresses both skill gaps and systemic disempowerment.
- Integrated Health Disparities Interventionmethodology: health-disparities-interventionBy combining preventive health screening, personal health tracking, and public awareness, the organization improves health outcomes for women of color, because sustained engagement and systemic advocacy together address both individual and structural drivers of health inequity.