Okulaja was also an experienced member of the Germany national basketball team and one of the key figures of the team, alongside Dirk Nowitzki or Patrick Femerling. He played with the team at the European Championships in 1995, 1997, 1999 and 2001. He competed with the German National Team at the 2002 FIBA World Basketball Championship in the US, winning bronze, and in Japan at the 2006 FIBA World Basketball Championship.