Omar Ba was born in Senegal in the 1970s and returned with his family to Senegal when he was six years old. After spending part of his childhood in Senegal, he lived in several countries, including Mauritania, Mali, and France, before settling permanently in Belgium in the 1990s. In Belgium, he became actively involved in various civil society organizations and ethno-cultural associations, including VOEM (the Association for the Development and Emancipation of Muslims), Care and Afrikaans Platform.

Care preceded the Afrikaans Platform as a federation of diaspora organizations. It mobilized strongly for the  the regularization of undocumented migrants and the fight against discrimination in Belgium. Care was behind significant actions, such as the occupation of churches to demand the regularization of undocumented people, which contributed to a broad regularization campaign across the country.

The tragic death of Semira Adamu in 1998 was a turning point for Ba, leading him to co-organize protest marches. This event catalyzed the creation of the African Platform, a federation of African associations in Belgium, of which Ba was a founding member. This platform played a crucial role in the fight against racism and stereotypes inherited from the colonial period, promoting solidarity and the representation of African communities to the Belgian government. Later, following the racist murders committed by Hans Van Temsche in 2006, he once again became involved as one of the organizers of marches in response to these atrocious events.

Omar Ba works as a diversity and inclusion consultant. He servex on the board of the European Network Against Racism (ENAR) and Africalia, contributed to the creation of the CINEMAF festival, worked for the organization 11.11.11, and was a board member of KifKif.