Shortly after graduating from Howard University, Maurice worked at the Long Island Progressive Coalition, leading advocacy and electoral campaigns. He became the Organizing Director for Citizen Action of New York, and then ran the New York State Civic Engagement Table, a coalition of community and civic engagement groups working on issue and electoral campaigns to build progressive power.

In response to the police violence in Ferguson and St. Louis after Mike Brown was killed, as well as police violence against Black people nationally, Maurice co-founded and managed Blackbird, an anchor organization within the Movement for Black Lives. Maurice provided strategic support and guidance to activists and groups around the country.