Complex sentence: Before accepting the head coaching role at Platinum Stars in 2012 Johnson mainly worked as youth and assistant coach for various clubs in South Africa among them assistant coach and later head of youth development at Ajax Cape Town, Mamelodi Sundowns and most recently Platinum Stars.
Split into simpler sentences: Before accepting the head coaching role at Platinum Stars in 2012 Johnson mainly worked as youth and assistant coach for various clubs in South Africa. Among them assistant coach and later head of youth development at Ajax Cape Town, Mamelodi Sundowns and most recently Platinum Stars.