The Public Service Alliance of Canada (PSAC) is a national union representing workers in the federal public service and various other sectors. Founded in 1966, it advocates for the rights and interests of its members, including fair wages, job security, and improved working conditions. PSAC is one of the largest unions in Canada, with thousands of members across the country. PSAC engages in collective bargaining and provides support for its members through various services, including legal assistance and training programs. The union also participates in political advocacy to influence policies that affect public service workers and their communities, promoting social justice and equality.