The purpose of the guidelines to career development herein is to promote job growth and improvement in the personnel who manage, operate, and maintain wastewater treatment plants. The justification is to assure competent functioning of these facilities for the protection of public health and environment. Properly trained career-oriented professional wastewater plant operators and technicians are the key components in any water pollution control facility. In this field, as in any other, it has been proven that training pays dividends in increased production, savings in depreciation of the capital investment, better morale, and other ways. The approach is to move from employment to training through specific modules of preparation which have been developed from recognized needs. These guidelines include 21 standard job classifications of positions normally found in the staffing of wastewater treatment plants, as defined by the Department of Labor, and related occupational summaries showing the specifications for each job. On each occupational summary sheet are the job description, basic qualifications, additional training needed, sources of that training, and entry and advancement information.