| Business | Phone |
| Accident Investigation & Rsrch 5480 Canotek Rd #12, Gloucester K1J 9H6 | (613) 749-6711 |
| Ainley Group 2724 Fenton Rd, Gloucester K1T 3T7 | (613) 822-1052 |
| Altman Engineering 689 La Verendrye Dr, Gloucester K1J 7X5 | (613) 742-1853 |
| Amtek Engineering Svc Ltd 1900 City Park Dr #510, Gloucester K1J 1A3 | (613) 749-3990 |
| Integral Dynamics 2759 Fenton Rd, Gloucester K1T 3T8 | (613) 822-9157 |
| Presentey Engineering Products 2784 Fenton Rd, Gloucester K1T 3T7 | (613) 822-1251 |
| Cmp Engineering 2790 Fenton Rd, Gloucester K1T 3T7 | (613) 822-7646 |
| Gastops 1011 Polytek St, Gloucester K1J 9J3 | (613) 744-3530 |