Brock Indus. Servs., LLC v. Laborers' Int'l Union of N. Am. Constr.

Sykes, Circuit Judge.

*514 Brock Industrial Services, LLC, is an Illinois-based provider of industrial services, including scaffolding, painting, insulation, and shoring. In January 2016 it entered into a labor agreement with Local 100 of the Laborers' International Union ("the Laborers Union" or "the Laborers"). The agreement requires arbitration of grievances and establishes a bipartite arbitration procedure for resolving most disputes. But work-jurisdiction disputes-disputes over whether the Laborers or another union is entitled to perform work-are instead subject to a tripartite arbitration…