International Guild of Symphony, Theater, Opera and Ballet Musicians

Welcome to the Official Web Site of the International Guild of Symphony, Theater, Opera and Ballet Musicians!

International Guild of Symphony, Theater, Opera and Ballet Musicians

The International Guild of Symphony, Opera and Ballet Musicians (known as “IGSOBM” or “The Guild”) was formed in Seattle as an independent union in 1985. The Guild won its first National Labor Relations Board-supervised elections in 1988, becoming the union representing the musician employees of the Seattle Symphony, Seattle Opera, Pacific Northwest Ballet and the Northwest Chamber Orchestra.

The Guild Adjusts Its Name to Include Theater Musicians

The members of IGSOBM, or The Guild, voted to change the name of their organization, adding “theater” to the groups under its purview, since many of its members do already perform for musical theater. The current name, the International Guild of Symphony, Theater, Opera and Ballet Musicians, or IGSTOBM, was filed with the Secretary of State with the State of Washington on October 22, 2018.



International Guild of Symphony, Theater, Opera, and Ballet Musicians

PO. Box 20013
Seattle, WA 98102

Email: 
Web Site: www.igstobm.org