[1][2] He served as the Minister of Energy and Minerals from May 2012 until his resignation in January 2015 following the Tegeta escrow scandal.

He won the parliamentary constituency of Musoma Rural in the general election and was thereafter appointed to his former portfolio by President John Magufuli.

[7] He also is the vice-president for Commission of the Geological Map of the World (CGMW), 2005-to date.

[8] Has also worked as a Visiting Researcher, University of Mainz, Germany in 2000–2009[9] He was the founder and first executive director of the International Council for Science (ICSU)- Africa Region.

[10] In 2009, he was among the nominated candidates[11] from Tanzania, for the post of Director General for UNESCO.