Home » Blog » Parallel Joins Pipefitter Union Local 539 Parallel Joins Pipefitter Union Local 539 Dale Klein February 24, 2018February 26, 2018 Comments Parallel Technologies signed up for the local 539 Pipefitter union in a strong move to expand its building automation business. Our customers want a full service team to design, build and service their buildings with one integrated team. The Pipefitters technicians will join an existing team of engineers, designers, programmers, and low & high voltage technicians. Share: Tags: