The Collaborative International Dictionary of English v.0.48:
Roundsman \Rounds"man\, n.; pl. Roundsmen. A patrolman; also, a policeman who acts as an inspector over the rounds of the patrolmen. [1913 Webster]WordNet (r) 3.0 (2006):
roundsman n 1: a workman employed to make rounds (to deliver goods or make inspections or so on)