No person employed by a public educational system or institution in a position which requires a certificate issued by the State Board of Examiners, or employed in a professional educational capacity by a school, college, or university which is either tax-supported or operated under contract with the State or on behalf of the State shall be disqualified by reason of such employment from holding any elective or appointive State, county or municipal office excepting as member of the board or body by which he is employed.
N.J.S. § 18A:6-8.4