| # | Company name | Role | # of projects |
|---|---|---|---|
| 21 | Rlh Fire Protection | Fire protection engineering | 0 |
| 22 | Roadrunner Fire & Safety | Fire protection engineering | 1 |
| 23 | Roadrunner Fire & Safety Eqpt | Fire protection engineering | 1 |
| 24 | Rockwool | Fire protection engineering | 1 |
| 25 | Rodan Fire Sprinklers | Fire protection engineering | 1 |
| 26 | Rodan Fire Sprinklers Inc | Fire protection engineering | 2 |
| 27 | Rolf Jensen & Associates | Fire protection engineering | 1 |
| 28 | Rolf Jensen & Associates | Fire protection engineering | 3 |
| 29 | Rolf Jensen & Associates, Inc. | Fire protection engineering | 62 |
| 30 | Rolling Oak Supply Inc. | Fire protection engineering | 2 |
| 31 | Royal Fire Protection | Fire protection engineering | 0 |
| 32 | RTM Consultants, Inc. | Fire protection engineering | 8 |
| 33 | Rustic Fire Protection Inc. | Fire protection engineering | 0 |
| 34 | Ryan Fire Protection, Inc. | Fire protection engineering | 14 |