International Union of Operating Engineers

The IUOE has about 400,000 members in 123 Locals in all 50 US states and Canada. Our members work as heavy equipment operators, mechanics and surveyors in the construction industry, as stationary engineers in refineries and high rises, as civilian contractors on military bases, and even as health care professionals.  

Founded in 1896, our union is the 10th largest in the AFL-CIO.  We have over 100 training and apprenticeship programs that help make our members the best and safest in the industry.   For more information, click over to

Local unions

Our four local unions represent members in a very large geographic area.  Local 178 is headquartered in Fort Worth and covers all of north Texas.  Local 406 has offices in New Orleans, Baton Rouge and Lake Charles, and represents the state of Louisiana.  Local 450 is based out of Houston, Texas and covers all of south and central Texas, with the exception of the El Paso area.  Local 627's offices are in Tulsa and Oklahoma City, and they cover all of Oklahoma.  IUOE Local 234 has offices all over Iowa and represents H&P and Stationary workers in almost the whole state.  
Click on a link for more information about a specific local!