This document provides guidance for individuals and organizations looking to take on professional community building work. It begins by outlining the audience and objectives. The audience includes those passionate about transforming their community's systems who feel alone in their work. The objectives are to provide a mental model, checklist, and examples to help get started. It then delves into what professional community building entails, including strategically and authentically building communities to address social problems. Key aspects covered are understanding the current situation, reengaging the community, and fueling members to work together towards solutions.