This study presents the research and production processes for the development of a Vocational Training computer game workplace simulator that will be used to deliver competency-based training of Occupational Health and Safety and planning competencies in the Engineering sector. The project is a collaboration between the Centre for Vocational & Workbased Research in the Faculty of Technical and Trade Innovation, and the School of Creative Industries at Victoria University, Melbourne, Australia. The study focuses on the design and development of immersive educational environments and assesses the optimal level of interactivity and game play necessary to achieve identified learning outcomes. This application of games technologies and the development of immersive learning environments enables the targeted delivery of flexible, customised learning programs in the workplace ensuring participant engagement through active learning.