Valentim Ximenes is an East Timorese politician and academic, and a member of the Fretilin political party. Between 2017 and 2018, he was the Minister for State Administration under the VII Constitutional Government of East Timor led by Mari Alkatiri. Previously, between 2005 and 2007, he was the Vice Minister for State Administration under the V Constitutional Government also led by Mari Alkatiri.

The VII Constitutional Government was the seventh Constitutional Government under the Constitution of East Timor. Formed on 15 September 2017, it was led by the country's second Prime Minister, Mari Alkatiri, and was replaced by the VIII Constitutional Government on 22 June 2018.