A global service manager needs to have a combination of skills and qualifications to be successful. They should have a solid understanding of the service domain, the technologies and tools used to deliver and support the services, as well as knowledge of best practices and standards for service management, such as ITIL, ISO 20000, or COBIT. Additionally, strong leadership, communication, negotiation, problem-solving, decision-making, and project management skills are essential. A global service manager must also be able to plan, coordinate, monitor, and evaluate the service delivery performance and quality across different teams, functions, and locations. They should also be able to manage the relationships and expectations of customers, stakeholders, and partners. Moreover, they should have a high level of cultural awareness, sensitivity, and adaptability to effectively communicate with people from different backgrounds. A bachelor's or master's degree in a relevant field such as business administration or engineering is often preferred for this role. Professional certifications in service management such as ITIL Expert or ISO 20000 Auditor may also be required.