| # | Company name | Role | # of projects |
|---|---|---|---|
| 641 | Quality Fire Protection | Fire protection engineering | 1 |
| 642 | Quality Fire Protection | Fire protection engineering | 0 |
| 643 | Quality Fire Protection | Fire protection engineering | 0 |
| 644 | Quality Sound & Communications | Fire protection engineering | 1 |
| 645 | Quality Sprinkler Co., Inc. | Fire protection engineering | 6 |
| 646 | Quick Response Fire Protection | Fire protection engineering | 0 |
| 647 | R B M Guardian Fire Protection Inc | Fire protection engineering | 1 |
| 648 | R J Van Plumbing | Fire protection engineering | 0 |
| 649 | R M Fire Protection | Fire protection engineering | 0 |
| 650 | R W J Corporation | Fire protection engineering | 1 |
| 651 | R.E. Griesemer, Inc. | Fire protection engineering | 1 |
| 652 | Rael Automatic Sprinkler Co. | Fire protection engineering | 0 |
| 653 | Rainier Group Fire Systems | Fire protection engineering | 0 |
| 654 | Ralph Gerdes Consultants LLC | Fire protection engineering | 5 |
| 655 | Ramkor International FZCO | Fire protection engineering | 4 |
| 656 | Rasstech Services CC | Fire protection engineering | 1 |
| 657 | Rbm Guardian Fire Protection | Fire protection engineering | 0 |
| 658 | RCI Systems | Fire protection engineering | 0 |
| 659 | Red Coach Fire | Fire protection engineering | 1 |
| 660 | Reliable Fire Protection | Fire protection engineering | 0 |