This follows a suit filed by COTU which wants Atwoli reinstated in the board of trustees.
An activist, Charles Omanga has also filed a separate suit against Kambi, arguing that the Cabinet Secretary’s actions are unconstitutional.
The COTU and FKE bosses have equally protested the move, vowing to challenge them in court.
COTU has already threatened to mobilise a countrywide workers’ strike on August 4 if the two are not reinstated.
In retiring them, the Cabinet Secretary announced that their continued stay at the board was contravening the new NSSF Act, having served for 15 and 11 years respectively.