For most British composers active in the twentieth century, the actual writing of music was only one of many skills they were obliged to develop. Many composers were also actively engaged in the fields of teaching, performance, and administration, and could supplement their income with a variety of other jobs, ranging from adjudication and private tutoring to broadcasting and music criticism. Additionally, the growth in popularity of radio, television, and film opened up new opportunities for composers in lighter genres that had hitherto not been available, either to supplement their contributions to more traditional concert hall repertory, or as dedicated positions in their own right. This chapter will examine these various career paths and responsibilities, looking at how British composers’ training, abilities, interests, and sociocultural status shaped and directed their vocational trajectories.