... J.S.A. 18A:17-3 (emphasis added).] In turn, N.J.S.A. 18A:17-4 establishes a "last in, first out" rule for reductions in ... previous years of service in his respective positions and employments. [ N.J.S.A. 18A:17-4 (emphasis added).] A custodial employee with a fixed contract has ...