In 2005, Washington originated the role of Dr. Preston Burke on the ABC medical drama Grey's Anatomy. His portrayal earned him two NAACP Image Awards for Outstanding Actor in a Drama Series, as well as a Screen Actors Guild Award.

He has been featured in four acclaimed Spike Lee films: Crooklyn, Clockers, Girl 6, and Girl on the Bus. Other feature credits include Love Jones, Dead Presidents, and Dancing in September - which earned him a nomination for an NAACP Image Award for Outstanding Actor.

Inspired by Washington's discovery of his direct genetic link to the Mende´ people of Sierra Leone, The Gondobay Manga Foundation advocates cooperative planning to achieve positive, timely improvements in the lives of the people of Sierra Leone.http://www.gondobaymangafoundation.org/#/home/

A Princess Found book is a powerful, intimate revelation of her quest across the world to learn of the chiefdom she could one day call her own. http://www.aprincessfound.com

As co-founder of the non-profit Kposowa Foundation Culberson heads up fundraising to support the children of Sierra Leone. The Kposowa Foundation is a 501c3 non-profit organization that was formed in 2005 by co-founders, Sarah Culberson and John Woehrle. Their first goal was to restore Bumpe High School to its prominence as a shining star of academic excellence in West Africa. Kposowa Foundation. http://www.bumpefund.org/Home.html