JIM REIF BUILDERS, INC. 150 SEMI DRIVE, MANITOWOC, WI. 54220. . JOB DESCRIPTION. . Estimator/Sales Representative. SUMMARY. Responsible for developing hard cost estimates on projects for construction as required by client and design documents, providing a total bid and detailed contract specifications. ESSENTIAL DUTIES AND RESPONSIBILITIES. Meet with clients, gather information, review construction documents, understand scope of work, then develo...