The duo joined Ingwe on a free transfer after they had been handed release letters by their respective former clubs.
Ndege was dropped from Tusker’s squad late last year by head coach Robert Matano and was heavily linked with a move to Gor Mahia, but the deal did not go through.
Confirming the developments to Goal.com, AFC Leopards team manager Nicholas Muyoti said that the duo have agreed to sign for the former league champions.
“I cannot say much because some aspects are yet to be agreed upon but I can confirm that they signed today (Saturday) and we are with them.”
Kimani, who captained Harambee Stars during last year's Cecafa Senior Challenge Cup in Kampala, Uganda, expressed delight after penning a two year deal terming the move 'a step in the right direction.'
"Obviously am very excited. This is a step up from Mathare United as I am going to be playing for a club that consistently challenges for trophies. I had a good time and fond memories of my time at Mathare but its time for a new challenge."
Muyoti also confirmed that Ingwe had captured the signature of former Tusker and Nakuru All Stars defender Noah Abich.
Ndege is expected to add punch in Leopards’ attack and his speed could prove useful in breaking defences while the presence of Kimani at the back is expected to bring some stability.
Meanwhile, Thika United have confirmed the capture of former Nairobi City Stars utility player David King'atua. Thika United coach James Kamau confirmed the player had signed a three year contract with the Brookside sponsored side.
"It’s a lot of wealth included to the team and a good utility player who is going to bring depth and competitiveness. I first spotted King’atua and Gateri who is in South Africa right now, in a youth tournament in Nairobi sometime back and the duo impressed me, am now glad he is with us," said Kamau.