Dimitri Konstantinovich Simes (Russian: Дмитрий Константинович Саймс; born October 29, 1947) is a Russian-American author, editor, and political pundit.

Simes was selected to lead the Center by former President Richard Nixon, to whom he served as an informal foreign policy advisor and with whom he traveled regularly to Russia and other former Soviet states as well as Western and Central Europe.

[3] He immigrated to the United States in 1973, seeking intellectual and political freedom; he had twice been expelled from university in Russia for protesting Soviet involvement in the Vietnam War.

[6] In September 2018, historian Yuri Felshtinsky published an article about Simes' past encounters with unregistered Russian agent Maria Butina.

[7] Simes' name has appeared 100 times in U.S. Special Counsel Robert Mueller report about Russian interference in the 2016 United States elections.