This term is being displaced bylogger.See note atlumbering(def. 1).
1826  In the North West, we understand, the fires have been greatest in the vicinity of the little Sevogle, where many excellent groves of timber were untouched by the axe of the Lumberer.
1846  The lumberers, who are the cutters and conveyors of timber, pass a short and excited existence.
1933  "Did you notice, Sir . . . any indications on our lake of that singular human species, calling themselves 'lumberers'?"