Arkhom served in service under the
Office of the National Economic and Social Development Board. He served as Director of Economic Analysis and Projection Division from 1996 to 1999. He became a policy and planning expert in 1999–2000, then was appointed Assistant Secretary-General of Office of the National Economic and Social Development Council (2000-2003). Following that he was appointed Policy and Planning Advisor until 2004, when he was appointed Deputy Secretary-General of the Office of the National Economic and Social Development Board. In 2010 he was appointed Secretary-General of the Office of the National Economic and Social Development Board. In 2014 he was appointed a member of the
National Legislative Assembly. Later in August of the same year, He resigned from the NIA and took the position of Deputy Minister of Transport In the government of General
Prayut Chan-o-cha. Later, in August 2015, he was appointed Minister of Transport. In 2020 Arkhom was appointed Minister of Finance on October 5, 2020. == Royal decorations ==