His father, Dugeriin Dashzegve, was a lifelong agricultural leader, serving as the head of the “Jaran Jil Cooperative” and a prominent local party figure.

As a young leader Amarbayasgalan was appointed as the Head of the Communications and Public Relations Division of the Mongolian People's Party by then-Secretary General Khurelsukh Ukhnaa.

As the MPP group leader, he successfully advocated for a 1 billion MNT budget allocation to the National Cancer Center, enabling the purchase and installation of equipment for liver transplantation surgeries.

This was a landmark achievement that allowed Mongolian patients to access life-saving procedures domestically, reducing reliance on expensive treatments abroad.

During his time as Secretary General, Amarbayasgalan focused on modernizing the party's operations, introducing data-driven strategies, and fostering a more inclusive and transparent political culture.