| Business | Phone |
| Allegheny County Joint 1549 Woodruff St, Pittsburgh 15220 | (412) 481-0333 |
| Amalgamated Transit Union 85 1613 Penn Ave, Pittsburgh 15222 | (412) 281-5583 |
| American Federation-State Empl 116 Blvd Of The Allies, Pittsburgh 15222 | (412) 471-1218 |
| American Federation-Tv & Radio 625 Stanwix St # 2007, Pittsburgh 15222 | (412) 281-6767 |
| Automotive Chauffeurs Parts 625 Stanwix St # 1906, Pittsburgh 15222 | (412) 281-4633 |
| Bethel Park Federation-Teacher 1725 Washington Rd # 102, Pittsburgh 15241 | (412) 833-8333 |
| Bricklayers & Allied Crafts 100 Kingston Dr, Pittsburgh 15235 | (412) 825-0923 |
| Building Trades Welfare Fund 5 Hot Metal St # 200, Pittsburgh 15203 | (412) 432-1127 |
| Carpenters Combined Funds Inc 495 Mansfield Ave # 1, Pittsburgh 15205 | (412) 922-5330 |
| Cement Masons Union Local 526 2606 California Ave, Pittsburgh 15212 | (412) 761-6310 |
| Communications Workers-America 1 Smithfield St, Pittsburgh 15222 | (412) 391-6646 |
| Communications Workers-America 11 Parkway Ctr # 230, Pittsburgh 15220 | (412) 922-7773 |
| Communications Workers-America 2650 Library Rd, Pittsburgh 15234 | (412) 281-1863 |
| Construction & General Laborer 12 8th St, Pittsburgh 15222 | (412) 281-2640 |
| Cwa Local 13500 At & T Div 4641 Peoples Rd # 202, Pittsburgh 15237 | (412) 821-2070 |
| Dairy Industry Assn Of W Pa 12 Federal St # 300, Pittsburgh 15212 | (412) 392-2330 |
| Federation Of Independent Slry 4240 Greensburg Pike, Pittsburgh 15221 | (412) 273-3450 |
| Federation Of Pittsburgh Dcsn 680 Andersen Dr, Pittsburgh 15220 | (412) 921-6042 |
| Graphic Communications Intl 1825 Blvd Of The Allies, Pittsburgh 15219 | (412) 391-1377 |
| Patrick Hackett 4729 Doverdell Dr, Pittsburgh 15236 | (412) 881-2403 |
| Hotel & Restaurant Employees 229 Shiloh St, Pittsburgh 15211 | (412) 381-1032 |
| Hotel Club Motel Restaurant 57 433 Fort Pitt Blvd, Pittsburgh 15219 | (412) 381-1032 |
| Ibew 401 Wood St, Pittsburgh 15222 | (412) 765-2170 |
| Ibew 986 Greentree Rd, Pittsburgh 15220 | (412) 922-6969 |
| International Alliance-Theater 800 Penn Ave, Pittsburgh 15222 | (412) 281-4568 |
| International Association-Mach 86 S 26th St # 1, Pittsburgh 15203 | (412) 381-6464 |
| International Brothrhd-Elec Wk 5 Hot Metal St, Pittsburgh 15203 | (412) 432-1152 |
| International Union-Elevator 2945 Banksville Rd # 208, Pittsburgh 15216 | (412) 341-6666 |
| International Union-Oper Engrs 300 Saline St, Pittsburgh 15207 | (412) 422-4702 |
| International-Firemen & Oilers 239 4th Ave # 1002, Pittsburgh 15222 | (412) 281-7267 |
| Iron Workers Joint Apprntcshp 2315 Liberty Ave, Pittsburgh 15222 | (412) 471-4535 |
| Iron Workers Local Union 3 2201 Liberty Ave, Pittsburgh 15222 | (412) 227-6767 |
| Iron Workers Shopmen Local 527 2945 Banksville Rd, Pittsburgh 15216 | (412) 341-6180 |
| Iron Workers Welfare Plan W Pa 2201 Liberty Ave # 203, Pittsburgh 15222 | (412) 227-6740 |
| Jatc Local Union 5 Hot Metal St # 100, Pittsburgh 15203 | (412) 432-1145 |
| Laborer's Combined Funds 1109 5th Ave, Pittsburgh 15219 | (412) 263-0900 |
| Laborers District Council W Pa 1101 5th Ave, Pittsburgh 15219 | (412) 391-1712 |
| Laundry & Dry Cleaning Local 307 4th Ave # 405, Pittsburgh 15222 | (412) 281-8105 |
| Millmen's Local Union 1160 495 Mansfield Ave # 200, Pittsburgh 15205 | (412) 922-6204 |
| Millwright's Local Union 2235 495 Mansfield Ave # 300, Pittsburgh 15205 | (412) 922-6208 |
| Newspapar Guild Of Pittsburgh 60 Blvd Of The Allies, Pittsburgh 15222 | (412) 880-4001 |
| Pa Federation Teachers Union 10 S 19th St, Pittsburgh 15203 | (412) 431-5900 |
| Pennsylvania Social Svc Union 1 Smithfield St # 320, Pittsburgh 15222 | (412) 201-4407 |
| Pennsylvania State Correction 9 Oak Dr, Pittsburgh 15214 | (412) 931-0194 |
| Piledriver's Local Union 2235 495 Mansfield Ave # 300, Pittsburgh 15205 | (412) 922-8842 |
| Pittsburgh Area Postal Union 1414 Brighton Rd # 400, Pittsburgh 15212 | (412) 321-4700 |
| Pittsburgh Building & Constr 1231 Banksville Rd, Pittsburgh 15216 | (412) 344-4775 |
| Pittsburgh Local 154 Blrmkrs 1221 Banksville Rd, Pittsburgh 15216 | (412) 343-3072 |
| Pittsburgh Musicians Union 709 Forbes Ave, Pittsburgh 15219 | (412) 281-1822 |
| Service Employees Intl Union 130 7th St # 200, Pittsburgh 15222 | (412) 471-0690 |
| Sheet Metal Industry Journeymn 1200 Gulf Lab Rd, Pittsburgh 15238 | (412) 828-1386 |
| Sprinkler Fitters Local 542 2987 Babcock Blvd, Pittsburgh 15237 | (412) 822-8040 |
| Steamfitters Union 1517 Woodruff St, Pittsburgh 15220 | (412) 381-1133 |
| Teamsters Chauffeurs & Helpers 4701 Butler St, Pittsburgh 15201 | (412) 682-3700 |
| Teamsters Local Union 3700 S Water St # 160, Pittsburgh 15203 | (412) 481-5233 |
| Typographical Union 7 2961 W Liberty Ave # 218-220, Pittsburgh 15216 | (412) 561-8770 |
| United Electrical Radio & Mach 420 Fort Duquesne Blvd # 1400, Pittsburgh 15222 | (412) 471-8919 |
| United Faculty Of University 4515 Forbes Ave, Pittsburgh 15213 | (412) 687-4655 |
| United Food & Commercial Wrkrs 885 Progress St, Pittsburgh 15212 | (412) 321-1711 |
| United Steelworkers Of America 60 Blvd Of The Allies, Pittsburgh 15222 | (412) 562-2400 |
| United Steelworkers Of America 60 Boulevard Of The Allies, Pittsburgh 15222 | (412) 201-5143 |
| Utility Worker's Un Of America Pittsburgh 15228 | (412) 341-9033 |
| W Virginia Plumbers & Pipefit 5 Hot Metal St, Pittsburgh 15203 | (412) 432-5739 |