You can receive New Jersey pension credit for military service performed after October 13, 1994 while you were already enrolled in a state retirement system. The credit counts toward your eligibility for benefits, and it counts toward your actual retirement allowance only if you pay the pension contributions for your period of military service.
Contact the New Jersey Division of Pensions and Benefits when you return to state employment, and ask about crediting your military service. Fact Sheet 36 explains what to submit.
Your military orders and DD214 showing your service dates, and proof you returned to state employment within the timeframes protected by federal reemployment law.