Established in 1902, Operating Engineers Local 139 is a statewide trade union representing over 10,000 skilled equipment operators and service technicians in the state of Wisconsin with district offices in Pewaukee, Madison, Appleton and Altoona (near Eau Claire), and a state-certified training school in Coloma. APPRENTICESHIP: Learn about our apprenticeship program by visiting our training center website at http://139training.org/ or call 715-228-4911. PRE-APPRENTICESHIP: High school students can start their apprenticeship while still in high school by taking part in our career pathways available through Destinations Career Academy. Contact Laura Cataldo at 608-616-2835.