This book outlines a broad variety of capacity building projects in OH. It also introduces detailed experiences of occupational hygienists working abroad and working on special global topics including a discussion of how global trade agreements influence the practice and policy within OH. It describes the special needs of informal workers who do not have a "typical" employer and special challenges of creating university curricular guidelines for OH, building competency and increasing capacity. This book also informs experienced professionals in international OH building initiatives and directions.