N.H. Rev. Stat. § 37:9
The town manager during the time that he or she holds such appointment, may be manager of a district or precinct located wholly or mainly within the same town, and may be elected or appointed to any municipal office in such town or included district or precinct that would be subject to his or her supervision if occupied by another incumbent; but he or she shall hold no other elected or appointed public office of the town except justice of the peace or notary public except as otherwise provided in RSA 37:16. Town managers may be appointed, subject to the approval of the governing body of the town, to regional or state boards, committees, or commissions provided there is no incompatibility with the duties described in this chapter.
RSA 37:9
1929, 69:9. RL 55:9. 1947, 236:2, eff. June 26, 1947. 2004, 55 : 1 , eff. July 2, 2004.