President William Ruto nominated Kinyanjui on December 19 to take up the Trade docket, succeeding Salim Mvurya, who was reassigned to Sports.
Others named alongside him are ex-Kiambu Governor William Kabogo (ICT and Digital Economy) and former Health CS Mutahi Kagwe to lead the Agriculture ministry.
The two have, however, since thanked the president for considering them for his government.
Despite the announcement, Kinyanjui had remained quiet, fueling widespread speculation, including rumors on social media suggesting that he had declined the position.
However, in his first public statement since the nomination, Kinyanjui expressed his gratitude to the President for considering him for the role.
"For God and country, I accept the honour of nomination to serve our nation as the Cabinet Secretary for Investment, Trade, and Industry," he wrote on his social media pages.
"I take this opportunity to thank the President, H.E William Ruto, for demonstrating confidence in my ability to steer this critical docket."
He added: "As always, integrity, respect for the Constitution, and honesty shall guide my way."
The nominees are set to be appear before the National Assembly's Committee on Appointments on January 14 for vetting.
In a schedule released by parliament, Kagwe will be the first to be grilled, followed by Kabogo and later Kinjanjui.
It will begin at 12pm and end at 7pm with each of the nominees given two hours.
Kenyans have written memoranda on any of the nominees by 3 January.
“The Clerk of the National Assembly hereby invites members of the public to submit any representations they may have, by way of written statements on oath (affidavits), with supporting evidence, contesting the suitability of the candidates for appointment to the offices to which they have been nominated,” part of the statement by National Assembly Clerk Samuel Njoroge read.
