As per your demand buddy I will help you here to get the names of Security Guard Companies so that you can have idea about them.

Here I have some names of the companies
ADS Security
Advanced Alarm System
Advantage Security Inc.
Alert Protective Services
American Video and Security Ltd.
Anderson Security Agency
ATAC Security
Bond’s Alarm
Capital Guard & Patrol
Citadel Security Agency
Complete Security Systems
CPI Security
Custom Security Guard & Patrol
Eclipse Security Professionals LLC
EMC Security
First Defense Security
First Response, Inc.
Floyd Total Security
Friendly Security, Inc.
Imperial Security Inc.
Integral Protection, Inc.
Invictus Security
Lifeshield Home Security
Metro Protective Agency
Pro-Tect Security
Protect your Home
Protection One Inc.
Safeguard America
SafeNet Inc.
Security Alliance LLC
Security Florist
Security One
Security Pros, Inc.
Security USA
Smith Protective Services
Stat Security
Stryke Alarm
Top Guy Security & Investigations
Unlockit Locksmith and Security
US Security Associate Inc.
Valley Protective Services
Vivint
Voltage Security Inc.