- Amalgamated Transit Union, Local No. 998
- American Postal Workers Union Milwaukee Area Local AFL-CIO
- ATI/ Ladish Forging
- Bakery, Confectionery Tobacco Workers & Grain Millers, Local 1
- BeneSys, Inc. (BPA)
- BeneSys, Inc. Operating Engineers Health Fund
- Boilermakers Local 107
- BP Products North America Inc.
- Bricklayers & Allied Craftsmen District Council
- Chicago Regional Council of Carpenters Western Regional (Heartland)
- Chicago Teachers Union – Organizers
- Citizen Action of Wisconsin
- City of Kankakee
- Communications Workers of America
- Elevator Constructors Union, Local No. 15
- Fox River Valley Education Foundation
- GCC/IBT District Council 1
- GCC/IBT National Pension Fund
- GCC/IBT, Fox Valley Local 77-P
- GESB Sheet Metal Workers Federal Credit Union & Local 20
- IBEW Local No. 158
- IBEW Local No. 388
- IBEW Local No. 494
- IBEW Local No. 715
- IBEW Local No. 577
- IBEW Local No. 2150
- Illinois Nurses Association
- International Association of Heat & Frost Insulators and Asbestos Workers, Local No. 19
- International Foundation of Employee Benefit Plans
- Iron Workers Union, Local No. 8
- Lewis University
- Mid America Carpenters Apprentice & Training Program
- Mid America Carpenters Pension Fund
- Milwaukee Area Labor Council
- Milwaukee Area Sheet Metal Joint Apprenticeship & Training Committee
- Milwaukee Building & Construction Trades Council
- Milwaukee Police Association, Local No. 21, IUPA-AFL-CIO
- Milwaukee County Transit Service
- Molson Coors
- North Central States Regional Council of Carpenters
- Northeast WI Building & Construction Trades Council
- Northwestern Mutual Insurance
- Operating Engineers Union, Local No. 139
- Operating Engineers Union, Local No. 420
- Operative Plasterers & Cement Masons Union, Local No. 599
- Painters & Allied Trades, District Council No. 7 AFL-CIO
- Plumbers & Gas Fitters Union, Local No. 75
- Plumbers and Gas Fitter Local 75 Education Fund
- Plumbers & Steamfitters Union, Local No. 400
- Roofers Union, Local No. 65
- SEIU, HCII
- SEIU Health & Welfare Fund, Local No. 4
- SEIU-METC
- BeneSys Inc, (Sheet Metal Workers).
- Sheet Metal Workers Union, Local No. 18
- Steamfitters Training School
- Steamfitters Union, Local No. 601
- Teamster Members Retirement Plan
- Teamsters Union, Local No. 344, Sales & Service Industry
- The Previant Law Firm, S.C.
- UAW Local No. 94
- UAW Local No. 751
- UAW Local No. 838
- UAW Local No. 865
- UAW Local No. 893
- UAW Local No. 974
- UAW Local No. 1268
- UAW Senior Citizens Center, Inc.
- United Food & Commercial Workers Union, Local No. 1473
- Welfare & Pension Administration Service
- Wilson – McShane
- Wisconsin Federation of Nurses & Health Professionals, AFT-AFL-CIO
- Wisconsin Laborers Health & Pension Fund (BPA)
- Wisconsin State AFL-CIO
- Zenith American Solutions
