| # | Company name | Role | # of projects |
|---|---|---|---|
| 21 | International Fireprotection | Fire protection engineering | 1 |
| 22 | Inventions UK | Fire protection engineering | 0 |
| 23 | Island Fire | Fire protection engineering | 0 |
| 24 | ISO-Chemie GmbH | Fire protection engineering | 0 |
| 25 | Ivey Inc. | Fire protection engineering | 1 |