This book makes a compelling argument for the role of the engineering profession in advancing human development and security and its contribution to various peacebuilding and diplomatic efforts in the 21st-century world. How do engineers collaborate with other disciplines to deliver interventions contributing to peacebuilding and diplomatic efforts in conflict-affected, conflict-sensitive, and fragile community environments? How should engineers be trained in lifelong practice to do so? What principles should the engineering profession uphold while participating in peacebuilding and diplomatic initiatives? How does the engineering profession serve the local and global public good? The book emphasizes the importance of developing programs, such as peace engineering and engineering diplomacy, and training globally engaged engineers with attitudes, skills, knowledge, and lifelong experience to address the challenges of the 21st century. Engineering is not only about delivering technology. It involves developing and implementing solutions that benefit people and the planet (nature-based solutions), contribute to prosperity, create partnerships, and promote peace. Engineers must be systems thinkers and globally involved in actively participating in sustainable development, peacebuilding, peacemaking, peacekeeping, and diplomatic efforts.