N.J. Stat. Ann. § 40:37-95.4a

Any full-time employee appointed to office, position or employment by a county park commission in any county of the second class having a population of more than 460,000 and less than 525,000 pursuant to the provisions of section 4 of the act to which this act is a supplement (C. 40:37-95.4) shall secure tenure of office after serving three successive 1-year appointments. Such employee shall hold and continue to hold said office, position or employment during good behavior and shall not be removed therefrom except for good cause, upon written charges and after a public, fair and impartial hearing before the commission.