The chapter details the processes involved in establishing and developing a sustainable construction company. The chapter highlights the importance of team dynamics, organisational behaviour, and market forces in driving sustainable outcomes. Readers are introduced to the structure and registration of professional construction management organisations committed to sustainability. The chapter also addresses the behavioural considerations within construction teams and companies, recognising their influence on decision-making and long-term project performance. Key themes include project benchmarking, regulatory compliance, stakeholder engagement, and the use of innovative technologies and certifications to promote sustainability. By providing a comprehensive framework of principles, methods, and management strategies, the chapter offers a guide for professionals aiming to reduce environmental impact, support social equity, and enhance economic value across construction projects. Ultimately, it equips readers with the tools and understanding needed to contribute effectively to the creation of a sustainable built environment.