| Business | Phone |
| American Shield Private Sec 11612 Knott St # 14, Garden Grove 92841 | (714) 952-2777 |
| Gold Shield Enterprises 12881 Knott St # 101, Garden Grove 92841 | (714) 892-3245 |
| Around The Clock Security Svc 11752 Garden Grove Blvd, Garden Grove 92843 | (714) 638-0073 |