Aleksey Teksler was born on 19 January 1973 in Chelyabinsk in a family of employees, lived in the Metallurgical District.

In 1995 he graduated from the Norilsk Industrial Institute with a degree in economics and management in metallurgy, qualification engineer-economist.

In the second half of the 1990s, he became the head of the tax planning department of Norilsk Nickel, replacing Alexander Novak in this position.

[13][14][15] On 27 October 2015, by governmental order of Russian Prime Minister, Dmitry Medvedev, Teksler was reprimanded for “improper performance” of his official duties.

[17] In November 2017, he was involved as a witness in a court hearing in a criminal case against the Minister of Economic Development of Russia Alxey Ulyukayev, associated with the acquisition by Rosneft of a state block of shares in Bashneft.

[18] While working at the Ministry of Economy, he oversaw the transfer of the Korkinsky coal mine of the Chelyabinsk coal basin to the Russian Copper Company, for its reclamation by filling the Tominsky GOK for the extraction and processing of porphyry copper ore with waste.

[19][20] In connection with the massive protests of the city's population against the construction of this mining and processing plant, the issue of its settlement was under the control of the Russian President Vladimir Putin,[21][22][23][24] as well as the issues of air pollution in the city, in particular due to spontaneous combustion of coal seams in the open pit.

[36] He topped the list of the United Russia party in the elections to the Legislative Assembly of the Chelyabinsk Oblast in 2020.