This study has three major purposes: to describe systematically the practice of librarianship in Australian Commonwealth Government departments and agencies from the perspective of librarians employed in that environment; to relate the characteristics of government librarianship to librarians' perceptions of and attitudes to their work; and to assess the extent to which the work of Commonwealth Government librarians needs to be redesigned to improve the level of job satisfaction they experience. A subsidiary purpose is to test the job characteristics theory of work motivation on a population of librarians. Information was gathered by a survey questionnaire on a range of variables relating to librarians and their perceptions of different aspects of their jobs. The primary instrument for gathering data on perceptions was the complete form of the Job Diagnostic Survey. The population under investigation comprised those Commonwealth Government department and agency librarians employed on a full-time, permanent basis under the Public Service Act 1922. and located in Canberra. Because the population was small but diverse, it was decided to survey the total population rather than a random or stratified sample. One hundred and eight usable responses were received which represented a response rate of 83 percent. The results of the survey were analysed using the Statistical Package for the Social Sciences. Frequency distributions and Pearson's Product-Moment Correlations were calculated to determine the percentage of respondents who selected each option and the strength of relationships between pairs of variables. The study found that Commonwealth Government department and agency librarians in Australia are highly satisfied with their work generally, and with the environment in which it is performed. None of the null hypotheses relating to Commonwealth Government librarians and job satisfaction were rejected. All but one of the null hypotheses retating to the application of the job characteristics model to Commonwealth Government librarians are rejected. The study concludes by identifying issues and areas for further research in public sector librarianship.