| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | R B M Guardian Fire Protection Inc | Fire protection engineering | 1 |
| 2 | R J Van Plumbing | Fire protection engineering | 0 |
| 3 | R M Fire Protection | Fire protection engineering | 0 |
| 4 | R W J Corporation | Fire protection engineering | 1 |
| 5 | R.E. Griesemer, Inc. | Fire protection engineering | 1 |
| 6 | Rael Automatic Sprinkler Co. | Fire protection engineering | 0 |
| 7 | Rainier Group Fire Systems | Fire protection engineering | 0 |
| 8 | Ralph Gerdes Consultants LLC | Fire protection engineering | 5 |
| 9 | Ramkor International FZCO | Fire protection engineering | 4 |
| 10 | Rasstech Services CC | Fire protection engineering | 1 |
| 11 | Rbm Guardian Fire Protection | Fire protection engineering | 0 |
| 12 | RCI Systems | Fire protection engineering | 0 |
| 13 | Red Coach Fire | Fire protection engineering | 1 |
| 14 | Reliable Fire Protection | Fire protection engineering | 0 |
| 15 | Rescom Fire Systems | Fire protection engineering | 2 |
| 16 | Response Fire Protection, Inc. | Fire protection engineering | 1 |
| 17 | Rhino Fire Protection | Fire protection engineering | 1 |
| 18 | Rich Fire Protection Co. | Fire protection engineering | 0 |
| 19 | Ricmor Construction | Fire protection engineering | 1 |
| 20 | Rlh Fire Protection | Fire protection engineering | 0 |