Williams argued that his dismissal on two counts of alleged misconduct was substantively and procedurally unfair.
The first allegation was that he unjustifiably prejudiced the administration, discipline or efficiency of the department by undertaking a school excursion without prior approval.
The second allegation was that he failed to ensure that a correct roll-call for all the pupils who went on the camp was maintained.
The department issued Williams with a notice of dismissal relating to the death of Mpianzi in October.
Last month, the department reached an out-of-court settlement with the Mpianzi family regarding the pupil's death.
Though no amount was disclosed, the family last year lodged a civil claim of R20m against the school, the department, Nyathi Bush and River Break, the school governing body and the sacked principal.
“We are not fully happy about the outcome of the case but also realise that this matter has been dragging for too long, negatively affecting all who are affected. In that light, we will look for advice from the experts with a view to finding a last resolution to the matter,” said Gauteng education MEC Panyaza Lesufi.
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