Coach Luc Eymael has revealed to Goal that Oliech will hold a meeting with the club's top hierarchy on Tuesday to seal a transfer move.
"Oliech has had a very successful and positive trials since arriving and he will have a meeting with the management either today (Tuesday) or Wednesday to discuss a possible transfer.
"I am very confident he will sign a pre-contract but I don't know for how long.
"It will not be six months but I suspect a one year deal because window opens in June and the season restarts in August."
Eymael confirmed that he was impressed by Oliech, despite staying out of active football for several months. "Yes he (Oliech) looks very good and fit. He is scoring goals in training and that is the kind of striker I want for the club."
He joined the national team Harambee Stars as a youngster in 2002 playing his last game in 2015 when Kenya lost to Zambia in a 2017 Afcon qualifier in Nairobi.
Free State Stars is a South African club based in Bethlehem and plays in Premier Soccer League. Formerly known as Makwane Computer Stars and Qwa Qwa Stars, their most significant honour is winning the 1994 Coca-Cola Cup.