| Business | Phone |
| Alimar Security Inc 19701 Vernier Rd, Harper Woods 48225 | (313) 343-9173 |
| Hampton Security Group Llc 19701 Vernier Rd, Harper Woods 48225 | (313) 881-3095 |
| Professional Security Patrol 20008 Kelly Rd 3, Harper Woods 48225 | (313) 527-7091 |
| Triad Protection Agency 20008 Kelly Rd, Harper Woods 48225 | (313) 521-5810 |