Former Governance and Ethics permanent secretary John Githongo has been picked as one of Africa's most distinguished corruption fighters.
He received the award by the German Africa Foundation in Berlin on Tuesday, said a statement by Transparency International (TI).
Mr Githongo resigned from the Government in February while on an official trip to London.
He was the TI Kenya chapter director before he joined the Government in 2003.
Speaking from Berlin, TI chairman Peter Eigen said: "This is a great validation of the work Githongo has done over the years and indirectly for Transparency International's mission, a mission he has been an essential part of."
Mr Eigen said the award showed Mr Githongo had the support of the international community as he embarked on a new phase in his career.
"Mr Githongo remains a powerful advocate of governance reform in Kenya and across Africa," the statement said.
TI Regional Director for Africa and the Middle East Muzong Kodi said by adopting the African Union Convention on Preventing and Combating Corruption and by including a strong governance component in the New Partnership for Africa's Development, African leaders had committed themselves to fighting the scourge on the continent.
"The example by John Githongo will inspire other Africans to hold their governments accountable for this commitment," he said in a statement.
Originally a journalist, Mr Githongo began working with TI in 1996 and was later elected to its international board of directors.
He was appointed Executive Director of the Kenyan chapter in 1999, with a mandate to create a secretariat and a programme of activities.