He also held an "occasional" professorship at the Naval War College in Newport, Rhode Island, meaning he was not a full-time professor (though he was for some time), but did teach there fairly often.

From the years 1958 to 1968, Dr. Khrushchev worked as an engineer, then later as a deputy section head in charge of guidance systems for missile and space design.

In this capacity, he worked on cruise missiles for submarine craft, military and research spacecraft, Moon vehicles, and the Proton space booster.

Khrushchev moved to the United States with his wife Valentina from the Soviet Union in 1991, to teach at Brown University in Providence, Rhode Island.

His son from a previous marriage, Nikita Sergeyevich Khrushchev, a Russian journalist, died on 22 February 2007, aged 47, from a stroke.