Mapuor was born in Rumbek. In November 2012 he completed his Bachelor’s of Arts in Mass Communication at Kampala International University in Uganda. He also studied International Relations from 2007 to 2008 at Leaders Institute of Journalism and Legal Studies in Nairobi and was awarded a Diploma. Since 2010, Mapuor has contributed to The Citizen newspaper in Juba, specifically during holidays. During his studies, he worked as Political Affairs Editor with The Giraffe, a university tabloid. Currently, Mapuor is a freelance journalist. He joined The Niles in August 2012.