| Business | Phone |
| Blueprint Strategy Consulting 3 Roosevelt Ave, Old Greenwich 6870 | (203) 536-4464 |
| Colonnade One Management 51 Forest Ave, Old Greenwich 6870 | (203) 637-9946 |
| Portin-Parker Consulting 51 Forest Ave # 108, Old Greenwich 6870 | (203) 698-0242 |
| Organization Development Wwd 32 Halsey Dr, Old Greenwich 6870 | (203) 698-1750 |
| Mc Cready & Assoc 3 Kernan Pl, Old Greenwich 6870 | (203) 698-2699 |
| Intrix Corp 3 W End Ave, Old Greenwich 6870 | (203) 698-4400 |