Korolev's passion for his work was a characteristic that made him a great leader. He was committed to training younger engineers to move into his space and missile projects, even while consumed with his own work. Korolev knew that students would be the future of space exploration, which is why he made such an effort to communicate with them. Arkady Ostashev was one of Korolev's students, who Korolev hired to do dissertation work before later becoming an engineer and working on the R-2.