Who is Mikhail Eduardovich Sergetov from Red Storm Rising and what is their importance?

Mikhail Eduardovich Sergetov is an advisor to the governing body of Russia. His specialty is energy production and distribution, unfortunately, he has only been on the job for three months when the refinery is blown up. Sergetov's son later becomes affiliated with Alekseyev, and that fact impacts the actions of Sergetov himself. He remains among those who take control of the Russian government as the war comes to a close.