Thomas Mazimpaka was born in 1958 in Nkamba, Rwanda.
He is a writer (in three languages: French, English and German), a human rights activist, a teacher, a freelance translator and interpreter.
He completed his secondary education at the College du Saint Esprit in Bujumbura, Burundi, followed by his university studies in Finance Management at the Institut Supérieur de Commerce of Kisangani, Zaire (DRC).
Afterwards, he worked in different companies in finance departments in Rwanda or as an external auditor.
When the war broke out in October 1990, he fled his country and lived in Germany for almost eight years as an asylum seeker.
On his return to Rwanda, he worked as a director of a computer company. Then he worked in the German Development Service (DED) in Kigali.
He is the founder and president of the association Action Solidarité Nord-Sud which supports orphans and other vulnerable children.
In 2006, he completed his degree in sociology at Kigali Independent University.
He has also co-founded a language teaching school in Kigali, with a German friend.