The Madison Area Technical College Part-time Teachers Union filed a lawsuit against the college today alleging unfair labor practices, according to a press release from the union.
Union leaders argue that a new course assignment system will leave them out of work.
"This policy places hundreds of talented, committed, part-time faculty members at risk of having their course assignments stripped away," said Mike Kent, president of the part-time union, in a statement.
Under the new policy, full-time faculty can take overtime -- up to 40 percent of a regular load -- before some part-time faculty get assigned courses.
College officials were not immediately available for comment.
The part-time union is operating under a contract that is over a year overdue. The union had negotiated a tentative contract agreement with the college in April, but delayed a ratification vote because of concerns over the course assignment system.