About OSSTF/FEESO...

The Ontario Secondary School Teachers' Federation (OSSTF/FEESO) is a trade union founded in 1919, representing almost 60,000 members across Ontario. They include public high school teachers, occasional teachers, educational assistants, continuing education teachers and instructors, psychologists, secretaries, speech-language pathologists, social workers, plant support personnel, attendance counsellors, and many others in education.

The union works to protect its diverse membership which is represented in 140 bargaining units across the province.

OSSTF/FEESO bargaining units represent both English and French members in elementary and secondary school workplaces, private schools, consortia offering support services to school boards and universities.