The Collaborative International Dictionary of English v.0.48:

Laundryman \Laun"dry*man\, n.; pl. Laundrymen.
   A man who follows the business of laundering.
   [1913 Webster]

WordNet (r) 3.0 (2006):

laundryman
    n 1: operates industrial washing machine [syn: washerman,
         laundryman]