Book excerpt: As organizations navigate the complexities of modern information systems management (ISM), they face many challenges. Rapid technological advancements, changing workplace structures, and mainstreaming remote work have underscored the need for clear roles, responsibilities, and methods for interaction within ISM groups and with external stakeholders. This lack of clarity can lead to inefficiencies, inconsistencies, and even breakdowns in communication, hindering the organization's ability to manage its information systems effectively. Essential Information Systems Service Management serves as a comprehensive solution to the challenges of modern ISM. It uniquely compiles critical roles, responsibilities, workflows, processes, functions, and methods for successfully managing contemporary information systems. By providing a clear roadmap, this book empowers practitioners and students to navigate the evolving professional landscape confidently and competently, ensuring they can contribute effectively to their organizations.