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About Us Projects Join Us Contractors Apprenticeship Offices Contact Us Home Industry Links Announcements Notices Agreements PreApprenticeship Application Meetings are heldon the 4th Mondayof every month. 2017 OPCMIA Cement MasonsLocal 404 All Rights Reserved Powered By J. Arthur Associates Did you know the craftsmanship of a Cement Mason is one of the construction industrys most highly regarded and demanding skills. A Cement Masons craftsmanship is challenged on a daily basis while forming placing sculpting spraying shaping coloring texturing stamping smoothing and finishing wet concrete.