Tammy Sims Johnson

Senior Donor Relations Officer, California Community Foundation

Tammy Sims Johnson is the Senior Donor Relations Officer at the California Community Foundation and leads the team responsible for stewarding relationships with individuals, families, and corporations that partner with the community foundation to achieve their vision for meaningful giving.

Before joining CCF in 2012, Johnson worked as a communications professional for the Los Angeles Unified School District and the Mayor’s Office of Los Angeles/LA’s BEST After School Enrichment Program, and as a grant maker for the Riordan Foundation. She also worked in the private sector as a commercial real estate sales advisor.

She holds a bachelor’s degree from the University of Southern California and a Chartered Advisor in Philanthropy (CAP®) designation from the American College of Financial Services. Johnson is currently a master’s candidate in the USC Marshall School of Business for a Master of Science in social entrepreneurship.

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