Listed below are the members of the WERC Ad Hoc Roster of Arbitrators and Fact Finders. These individuals are not employed by the WERC. Roster members serve as grievance arbitrators, fact finders and interest arbitrators when selected from lists supplied by the WERC, billing their fees and expenses to the parties involved in those cases. Roster members are required to bill parties in accord with the fee and expense policies disclosed on the biographical and fee statement submitted by the roster member to the WERC.
| Name | Location | Bio |
| Susan J. M. Bauman | Madison, WI | View Bio |
| Howard S. Bellman | Madison, WI | View Bio |
| Ira S. Epstein | Mequon, WI | View Bio |
| Sharon A. Gallagher | Milwaukee, WI | View Bio |
| Amedeo A. Greco | Madison, WI | View Bio |
| Jerry L. Hetrick | Leesburg, IN | View Bio |
| Marvin F. Hill, Jr. | DeKalb, IL | View Bio |
| Steven G. Hoffmeyer | Coon Rapids, MN | View Bio |
| Jeffrey W. Jacobs | Minneapolis, MN | View Bio |
| Raleigh E. Jones | Madison, WI | View Bio |
| Edward B. Krinsky | Middleton, WI | View Bio |
| Martin H. Malin | Chicago, IL | View Bio |
| Dennis P. McGilligan | Madison, WI | View Bio |
| Stanley H. Michelstetter II | Sun Prairie, WI | View Bio |
| Richard John Miller | Maple Grove, MN | View Bio |
| Herman Torosian | Madison, WI | View Bio |
| Christine D. Ver Ploeg | St. Paul, MN | View Bio |
| Jeffrey B. Winton | Chicago, IL | View Bio |
| Michael A. Wojcik | Sugar Grove, IL | View Bio |
| Jacalyn J. Zimmerman | Lake Bluff, IL | View Bio |