Careers and Employment Outlook Employment of social and human service assistants is expected to grow much faster than the average for all occupations. Job prospects are expected to be excellent, particularly for applicants with relevant postsecondary education. Employment change. The number of social and human service assistants is expected to grow by nearly 23 percent between 2008 and 2018, which is much faster than the average for all occupations. This is due in large part to the aging population and increased demand for mental health and substance abuse treatment. As the elderly population continues to grow, the demand for social and human service assistants will expand. This is due in large part to the increased need for social services demanded by this population, such as adult day care, meal delivery programs and support during medical crises. Social and human service assistants, who assist in locating and providing these services, will be needed to meet this increased demand. Opportunities are expected to be good in private social service agencies. Employment in private agencies will grow, as State and local governments continue to contract out services to the private sector in an effort to cut costs. The number of jobs for social and human service assistants in State and local governments will grow, but not as fast as employment for social and human service assistants in other industries. Employment in the public sector may fluctuate with the level of funding provided by State and local governments and with the number of services contracted out to private organizations.