Kokkalis was the son of Socrates P. Kokkalis Sr., the founder of Intracom, a Greek telecommunications company that is the largest of its kind in southeastern Europe, Cleveland.com reported. The company employs some 5,700 workers, its website stated. The billionaire is also a board of directors member of Olympiacos F.C., a Greek professional soccer club. The younger Kokkalis served as a vice president with the team, which released a statement regarding Kokkalis’ death.