Johannes "Jo" Voigtmann is a German professional basketball player for Olimpia Milano of the Italian Lega Basket Serie A (LBA) and the EuroLeague. He is also a member of the senior German national team. He is 2.11 m tall and he plays at both the power forward and center positions.

Pallacanestro Olimpia Milano, commonly known as Olimpia Milano or as EA7 Emporio Armani Milan after its title sponsor, is an LBA Italian professional basketball team, based in Milan, Italy. Its colors are white and red, and the team is sometimes referred as "Scarpette Rosse" because team officials imported red Converse All-Star shoes for players from the United States. The tag line stuck, and the nickname is still used by many fans today.