| FREE LISTING: | ||
| AG Engineering Services | St. Peter & Paul Village, Sorsogon City | 211-2328 |
| AVCOM Electronics & Engineering System | Quezon Ave., Legazpi City | 820-5692 |
| Jackmaster Engineering | Door 1, RRITS Bldg., Concepcion Pequena, Naga City | 475-3410 |
| Jackmaster Engineering | Villa Grande Homes, Concepcion Grande, Naga City | 473-0309 |
| Kubo Architectural and Graphics Design | 1037 Rizal St., Legazpi City | 483-1554 |
| Penpower Electrical Engineering Field Services | 109 Ramaida Centrum, Dimasalang, Naga City | 811-5785 |