| Business | Phone |
| Glaziers Architectural Metal 297 N Marengo Ave, Pasadena 91101 | (626) 448-1565 |
| Ibew 297 N Marengo Ave, Pasadena 91101 | (626) 793-9695 |
| International Union-Oper Engrs 150 Corson St, Pasadena 91103 | (626) 792-8900 |
| Operating Engineers 150 Corson St, Pasadena 91103 | (626) 792-2519 |
| Painters Dist Council 297 N Marengo Ave # 120, Pasadena 91101 | (626) 584-9925 |
| Painters Local Union 1798 297 N Marengo Ave # 115, Pasadena 91101 | (626) 304-9640 |
| Service Employees Intl Union 309 S Raymond Ave, Pasadena 91105 | (626) 796-0051 |
| Painters 297 N Marengo Ave, Pasadena 91101 | (626) 304-9640 |
| American Postal Workers Union 150 E Colorado Blvd, Pasadena 91105 | (626) 585-1404 |
| American Postal Workers Union 595 Lincoln Ave # 208-209, Pasadena 91103 | (626) 795-1090 |
| International Union Operating 150 Corson St, Pasadena 91103 | (626) 584-0670 |
| Sclmoe Contract Cmplncs 100 Corson St, Pasadena 91103 | (626) 564-6070 |
| Branch 2200 National Assn 1310 N Oxford Ave, Pasadena 91104 | (626) 798-6122 |
| International Union Elevators 100 S Mentor Ave, Pasadena 91106 | (626) 449-1869 |