New Jersey Statutes Title 18A. Education 18A § 17-24.5

The position of shared superintendent or shared business administrator shall not be a tenurable position. If two or more boards of education appoint an individual from within one of the school districts to a shared position, the individual shall retain all tenure rights accrued in the positions in which he previously served within the district. However, in no event shall the districts be required to appoint a tenured individual from within any of the districts to fill a shared position.