| Business | Phone |
| Certified Siu Svc Inc 3279 Veterans Memorial Hwy #4d, Ronkonkoma 11779 | (631) 580-5210 |
| E T Investigative Security Svc 431 Croaton St, Ronkonkoma 11779 | (631) 737-2737 |
| International Private Invstgtn 2111 Smithtown Ave, Ronkonkoma 11779 | (631) 981-1177 |
| Investigative Research 138 Pond Rd, Ronkonkoma 11779 | (631) 467-8500 |