 | Security Guard Group Limited | london, ontario, canada | 134 | security and investigations | 2018 | |
 | gallagher security | hamilton, waikato region, new zealand | 273 | security and investigations | 1938 | |
 | aegis security & investigations inc. | ca, california, united states | 171 | security and investigations | 2007 | |
 | Paragon Security | toronto, ontario, canada | 2.6K | security and investigations | 1976 | |
 | Securico Electronics India Limited | Faridabad, haryana, india | 130 | security and investigations | 1982 | |
 | Guardian Alarm | Southfield, michigan, united states | 370 | security and investigations | 1930 | |
 | Abel | Leicester, england, united kingdom | 200 | security and investigations | 1965 | |
 | Analogic | peabody, massachusetts, united states | 866 | security and investigations | 1967 | |
 | sgw consulting group | london, england, united kingdom | 11 | security and investigations | 2003 | |
 | AP Security (APS) Ltd | Watford, england, united kingdom | 210 | security and investigations | 1991 | |
 | Dial One Security, Inc | Cincinnati, ohio, united states | 13 | security and investigations | 1979 | |
 | Premiershield | New Delhi, delhi, india | 97 | security and investigations | 1976 | |
 | American Services, Inc. | Greenville, south carolina, united states | 130 | security and investigations | 1975 | |
 | Citiguard Security | Harrow, england, united kingdom | 36 | security and investigations | 2011 | |
 | Woodwill Security Services | London, england, united kingdom | 12 | security and investigations | 2018 | |
 | Bytescare | new castle, delaware, united states | 63 | security and investigations | 2022 | |
 | Hart Security | Dubai, dubai, united arab emirates | 210 | security and investigations | 1999 | |
 | The World Protection Group | Beverly Hills, california, united states | 37 | security and investigations | 2001 | |
 | Advance Security Services Co. | st catharines, ontario, canada | 20 | security and investigations | 2022 | |
 | 2012 Security Ltd | Barking, england, united kingdom | 42 | security and investigations | 2011 | |
