Former commander of the 7th Corps of the Korean People's Army, in August 2011 he was appointed commander of the 4th Corps of the Korean People's Army, which is stationed in South Hwanghae Province.

Member of the eleventh and twelfth convocations of the Supreme People's Assembly, the North Korea's unicameral parliament.

After the death of Kim Jong-il in December 2011, Pyon In-son was ranked 63rd in the 232-person Funeral Committee.

[2] According to specialists, places on such lists defined the rank of politician in the hierarchy of the power apparatus.

A picture of Pyon shows him wearing all decorations awarded to him in ribbon form.