Mes served as Minister of Rural Development and Culture from 1998 to 2001, Minister of Rural Development from 2001 until 2003, and Minister of Human Development, Local Government, and Labour, from 2003 until 2005.
In 2007, Mes was briefly suspended from his duties at the Minister of States in the Ministry of National Development, due to a charge of a hit-and-run accident but the case did not go to court and Mes was restored to his post.
On May 26, 2014, Mes died in a road traffic accident in rural Toledo District. He was 64.
- Clements' encyclopedia of world governments John Clements - 2005 - Page 60
- RMilligan, Keisha. Marcial Mes - no case to answer. Amandala. 26 April 2007 (retrieved 29 April 2009)
- Jones, Patrick.Former government minister killed in traffic accident. "Breaking Belize News (Belize Media Group News)." 26 May 2014 (retrieved 26 May 2014)