It has been about three months since a riot at the prison left two inmates dead and four injured. Two guard also were injured in the riot.
Nebraska Association of Public Employees Director Mike Marvin says he has made his complaint known directly to Corrections Director Scott Frakes, but the two have not been able to reach an agreement.
A hearing will be held to decide the dispute.
According to Marvin, the Department of Correctional Services cannot maintain the long shifts unless it is determined an emergency situation remains in wake of the May 10th riot.
Marion Bailey, KLIN, contributed to this report.