Marvin-Alonzo Greer

Marvin-Alonzo Greer serves as the Lead Historic Interpretation and Community Engagement Officer for Prince George’s County Maryland’s Parks and Planning Commission. His flagship project is the curation and development of the county’s Sankofa Mobile Museum. When launched, the museum will travel around the DMV using history to teach social activism and helping children and families have a better understanding of how they can make meaningful impacts on their communities.

A native of Pasadena, California, Marvin-Alonzo grew up in Atlanta, Georgia where he graduated from Morehouse College with a BA in History and a minor in African American Studies. He has held leadership and managerial roles at museums and historical institutions, including the Atlanta History Center, Colonial Williamsburg and the Missouri Historical Society’s Soldiers Memorial Military Museum in St. Louis. 

His community activism and partnership with community organizations to place neighborhoods in historical context led to him being awarded the Emancipation Proclamation Award for Preserving African American History and Culture by the City of Atlanta. Marvin-Alonzo uses his social media profile MAG the Historian to teach Black history and has partnered with PBS,, and Google for Creators for various social media campaigns. In 2021 Marvin-Alonzo was profiled in People Magazine as a “Black Activists, Artists, Historians and Changemakers You Should Follow on Social Media”.



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