N.J. Stat. Ann. § 2A:8-13.1

1. Any person holding office, position or employment as administrator of the municipal court in any borough who has held such office, position or employment continuously for five years or more and who has become certified during that period shall hold and continue to hold said office, position or employment during good behavior and shall not be removed therefrom for political or other reasons except for good cause, upon written charges and after a public, fair and impartial hearing.