Labor activity began as a teacher of the Almaty Institute of National Economy of the Kazakh SSR.

From February 2006, he headed the JSC "Holding on the management of state assets "Samruk"".

On 12 March 2010, he was named as the head of the newly created ministry of oil and gas.

[3] 2018–2021 – Chairman of the Board of the Joint-Stock Company «НК „Қазақстан темір жолы“».

[4] In 2009, Mynbayev and Chinese officials discussed the current state and prospects of cooperation within the CNPC-AktobeMunaiGaz JV to develop Kenkiyak and Zhanazhol oilfields; they also dwelt on completion of the 2nd segment of the Kazakhstan-China oil pipeline as well as on new bilateral projects.