In 1979, Environmental Protection Agency professionals organized for a voice at work with ESC Local 20. 今天, over 300 Environmental Scientists, 生命科学家, Environmental Engineers and other professional and technical classifications at the 环境保护署 Region 9 are represented by ESC Local 20. The first contract included a sabbatical leave provision believed to be the first of its kind in any 联邦 Labor Agreement.

Professionals represented by this contract are part of the Union’s Government, Administrative, Technical Unit.