| Business | Phone |
| United Public Workers 362 E Lanikaula St, Hilo 96720 | (808) 961-3424 |
| Shopo Hawaii Chapter 688 Kinoole St 220b, Hilo 96720 | (808) 934-8405 |
| Operating Engineers 50 Waianuenue Ave, Hilo 96720 | (808) 935-8709 |
| Laborers International Union 749 Mililani St, Hilo 96720 | (808) 935-2869 |
| Ibew 80 Pauahi St 207a, Hilo 96720 | (808) 961-6444 |
| Ilwu Local 142 100 W Lanikaula St, Hilo 96720 | (808) 935-3727 |
| Hawaii Newspaper Guild 165 Keawe St, Hilo 96720 | (808) 969-3088 |
| Hgeaafscme Local 152 495 Manono St, Hilo 96720 | (808) 935-6841 |
| Carpenters Union Local 745 525 Kilauea Ave 205, Hilo 96720 | (808) 935-8575 |