This study examined the perceptions of teacher aides regarding their roles and responsibilities in supporting senior students with special needs in mainstream secondary school settings. Fourteen teacher aides were interviewed using a semi-structured interview guide to determine their views regarding their roles and responsibilities, the challenges they faced, their relationships with parents, teachers and students, and their professional development needs. Findings from the study indicated that the participating teacher aides performed a variety of roles and that they often had a considerable degree of autonomy and responsibility in providing academic, social, and behavioural support to the students they served. Teacher aides reported that they were generally satisfied with their jobs and proud of their contributions and accomplishments. However their relationships with teaching staff were often challenging. Teacher aides also indicated that their roles and responsibilities were not clearly delineated, their professional status was not formally recognised, opportunities for advancement and professional development were limited, and that they received little systematic feedback and evaluation of their performance.