This book shares a modern, human-centred approach to organisational psychology with practical diagnostics and tools for sustainable leadership and progressive safety culture. Its stories-from construction crews to business leaders-demonstrate real-world success, including increased productivity, reduced incident rates, and decreased turnover. The GLOW Toolkit is a cornerstone, providing leaders and safety professionals with step-by-step guidance for positive transformation aligned with ISO 45003 standards and psychosocial risk management.