The former Aston Villa, Newcastle and Marseille defender returns to his old team barely a week after his sacking from fellow Ligue 1 club Rennes.
Beye started his coaching career as assistant manager at AS Poissy, ahead of a similar role with Red Star FC.
He took over a Stade Rennais at the beginning of 2025 and has left the club in six-place on the 2025/26 league standings.
He joins a Marseille side in fourth place as a replacement for Roberto De Zerbi, who left after 5-0 thrashing from Paris St-Germain and following their elimination from the Champions League.
A club statement read: "His deep attachment to Olympique de Marseille and his intimate knowledge of the environment in Marseille can be major assets in taking the club to the next step,"
Beye added: "I don't come to make up, I come because it’s my home."
Marseille are next in action away to 12th-placed Brest on Friday.
Paris Saint‑Germain are taking a cautious approach with Fabian Ruiz as they manage a growing injury list ahead of their crucial Champions League play‑off second leg against AS Monaco on Wednesday.
Paris Saint-Germain have decided to end their legal battle with Kylian Mbappe after confirming they will not appeal a French labour court ruling ordering the club to pay up to 61 million euros in unpaid wages and bonuses.
Habib Beye has officially been unveiled as the new head coach of Olympique de Marseille on an interim basis, marking a return to the former Senegal international's boyhood club.
Luis Enrique has insisted Paris Saint-Germain were fully focused on the task ahead as they prepare to defend their European crown against AS Monaco in their Champions League play-off clash on Tuesday night.
