Workforce development is a set of processes that govern the identification, recruitment, assessment and training of job seekers into employment as well as the maintenance and advancement of these persons in their careers. Given the complexity of what workforce development entails, a systems approach is illustrated to ensure that the broader goal of human capital investment is met. The paper identifies the foundational assumptions of systems thinking, classifies the key stakeholders in workforce development and provides brief case studies on where systems thinking has been deployed. The paper also enunciates an outcomes framework to give the metrics by which progress towards performance goals can be measured.