After receiving his diploma, he entered graduate school at the US-Canadian Institute of the USSR Academy of Sciences. In 1987 he defended his thesis for a candidate of historical sciences on the topic "Left-liberal forces in the political-social life of the USA, 1970-1980s. Before joining the diplomatic service, from 1983 to 1992, he worked at the US-Canadian Institute of the Academy of Sciences of the USSR, holding the positions of graduate student, junior research fellow, and research associate. In the years 1992-1997 he held the positions of First Secretary, Head of Department and Head of Department of the North American Department of the Russian Foreign Ministry. In February 2010, he was appointed director of the North American Department of the Russian Foreign Ministry. On March 6, 2025, by order of Russian President Vladimir Putin, Alexander Darchiev was appointed Russian ambassador to the United States. Russia's former ambassador to Mauritius and Macedonia has died. According to colleagues, in public speeches he often used harsh rhetoric regarding the policies of the United States and Canada. In particular, in 2022, he accused Washington of trying to maintain the weakening American hegemony and spoke of Russophobic hysteria in the US and Canada. The former US ambassador to Russia, John Sullivan, described in his memoirs several episodes related to joint work with Darchiev, drawing attention to the fact that the Russian diplomat adhered to an uncompromising dialogue style.

After receiving his diploma, he entered graduate school at the US-Canadian Institute of the USSR Academy of Sciences. In 1987 he defended his thesis for a candidate of historical sciences on the topic "Left-liberal forces in the political-social life of the USA, 1970-1980s. Before joining the diplomatic service, from 1983 to 1992, he worked at the US-Canadian Institute of the Academy of Sciences of the USSR, holding the positions of graduate student, junior research fellow, and research associate. In the years 1992-1997 he held the positions of First Secretary, Head of Department and Head of Department of the North American Department of the Russian Foreign Ministry. In February 2010, he was appointed director of the North American Department of the Russian Foreign Ministry. On March 6, 2025, by order of Russian President Vladimir Putin, Alexander Darchiev was appointed Russian ambassador to the United States. Russia's former ambassador to Mauritius and Macedonia has died. According to colleagues, in public speeches he often used harsh rhetoric regarding the policies of the United States and Canada. In particular, in 2022, he accused Washington of trying to maintain the weakening American hegemony and spoke of Russophobic hysteria in the US and Canada. The former US ambassador to Russia, John Sullivan, described in his memoirs several episodes related to joint work with Darchiev, drawing attention to the fact that the Russian diplomat adhered to an uncompromising dialogue style.