Photo by: John Dixon/The News-Gazette Several hundred members of the Non-Tenure Faculty Coalition, and their supporters, rally on the University of Illinois Quad, east of the English Building in Urbana, on Tuesday April 19, 2016. The union walked a picket line, beginning a two-day strike against the UI, after being involved in contract negotiations for over 18 months. Other Related Content It's not money: Here are sticking points in UI contract talks

UPDATED 9:13 p.m. Monday

URBANA — A faculty union that staged a two-day strike at the University of Illinois last week has scheduled a "work-in" at the main administration building on campus Tuesday and Wednesday.

Members of the Nontenure Faculty Coalition Local 6546 plan to do their grading or research or hold office hours at the UI's Henry Administration Building on the main Quad from 8 a.m. to 5 p.m. on those two days.

Union President Shawn Gilmore said members over the weekend discussed ways to support the next bargaining session with the university, scheduled for Wednesday with a federal mediator.

"The general consensus was we want to put some pressure on the administration to make sure they're actually making bargaining move forward," he said. "But we are not striking, because we are waiting to see if something does happen."

The union's Facebook post announcing today's work-in said it has received no "substantive response" from administrators since last week's strike, which ended Wednesday evening.

But Gilmore said interim chancellor Barbara Wilson did reply Friday to his email confirming that striking faculty members had returned to work.

"We believe we are close and we will do everything we can do to facilitate the negotiation process. We look forward to progress on April 27," she wrote.

The two sides have been negotiating since October 2014.

Gilmore said faculty members would be stationed along the hallways inside the Henry building, as well as outside, "to put our labor on display and make clear that we're not just passively all waiting in our offices for something to happen."

That includes the hallways outside the third-floor offices for the UI Board of Trustees and President Tim Killeen.

But Gilmore said union members would provide space for students to get in and out of classes held in the building.

"We're not looking to obstruct anything," said Gilmore, an English lecturer who plans to do grading there on Tuesday and hold office hours there on Wednesday afternoon.

The union represents almost 500 lecturers, researchers and other faculty members who are not part of the tenure system. About 400 hold teaching positions and cover nearly 40 percent of all undergraduate courses on campus.

The UI classifies them as "specialized faculty," though they hold many titles, and all but 19 work on year-to-year contracts.

The union is pressing for longer contracts, more timely notifications of job renewals, a defined role in campus governance and guarantees of academic freedom. Administrators say they want the same things but not as part of a labor contract, especially given budget constraints.