This book introduces a framework to assist human resource practitioners and organisations embrace strategies that will drive high engagement levels within organisations with a union presence. The authors address established definitions of engagement and how they have been conceptualised in academic and practitioners' literature, before exploring and unpacking circumstances that influence levels of engagement amongst employees in a unionised environment. In doing so, the framework introduced elaborates on approaches and interventions with the greatest potential to create, improve, and embed high levels of engagement within the unionised work environment.