Operative Plasterers' and Cement Masons' International Association

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OPCMIA

Operative Plasterers' and Cement Masons' International Association of the United States and Canada
Founded	July 21, 1864; 160 years ago (1864-07-21)
Headquarters	9700 Patuxent Woods Drive, Suite 200 Columbia, Maryland 21046
Location	United States and Canada
Members	43,739 (2018)[1]
Key people	Daniel Stepano (general president)
Affiliations	AFL–CIO, Canadian Labour Congress
Website	www.opcmia.org

The Operative Plasterers' and Cement Masons' International Association of the United States and Canada (OPCMIA) is a trade union of plasterers and cement masons in the construction industry in the United States and Canada. Members of the union finish interior walls and ceilings of buildings and apply plaster on masonry, metal, and wire lath or gypsum. Cement masons are responsible for all concrete construction, including pouring and finishing of slabs, steps, wall tops, curbs and gutters, sidewalks, and paving. The organization is a member union of the AFL–CIO and Canadian Labour Congress.