Sergey Volkov is a Russian cosmonaut born on April 19, 1976, in Tashkent, Uzbekistan. He graduated from the Kachinsk Air Force Pilot School and later earned a degree in engineering. Volkov joined the Russian space program in 1997 and has participated in multiple space missions, including long-duration stays on the International Space Station (ISS). Volkov's first spaceflight was in 2008, and he has since completed several missions, contributing to scientific research and international cooperation in space exploration. He is known for his work in various roles, including commander and flight engineer, showcasing his expertise in space operations.