S² Consulting

S-Squared is an organization development consulting firm founded by Sandy Stonesifer, a skilled facilitator, trainer, and change consultant.

S-Squared has worked with a wide range of for-profit, not-for-profit, and international social sector clients including: 

Population Services International (PSI)


The US Agency for International Development (USAID)

League of Conservation Voters


The Brennan Center for Justice at NYU School of Law

Taste of DC

SeriousFun Children's Network


Young Nonprofit Professionals Network (YNPNdc)

The International Corporate Accountability Roundtable (ICAR)

Public Knowledge


Washington Improv Theater

Martha's Table

Chavez Charter Schools

Foot and Ankle Specialists of the Mid-Atlantic  

As a Senior Consultant with Retreats that Work, Sandy has also worked with the Corporation for Public Broadcasting, Global Innovation Fund, Africare, WETA, the Inter-American Development Bank, the Caribbean Development Bank, and Arlington County. In her role as a ProInspire faculty member she has led multiple leadership development programs and workshops, including work with The Washington Center, Communities in Schools, and The Kresge Foundation.


Do you need to make a change in your organization? Contact sandy@ssquared.org or call (202) 549-4302.