He was born on January 22, 1972, in St. Petersburg.
Aisen Nikolaev in 1997-2004 years was a member of the republican parliament (Il Tumen).
In 1998-2002 years headed the bank Almazergienbank.
In 2004, he was appointed Minister of Finance of Yakutia.
In 2007 -Head of the presidential and government administration of Yakutia, then the 1st deputy chairman of the government.
Yakutsk headed since March 2012 year.
Since September 2018 - Head of the Republic of Sakha (Yakutia).