Protecting What Matters Most
Our team comes from specialist defence and policing backgrounds — explosive ordnance disposal technicians (EOD), dignitary protection specialists, technical surveillance operators, and protective operations specialists.
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What matters more is what those careers built: the judgement to read a situation early, calm it before it escalates, and know when to step forward or stay back.
Quiet when that protects you. Present when it doesn't.
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Our team have refined their craft in demanding, complex environments.
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The work isn't about presence. It's about reading a moment correctly — and acting before anyone else has noticed.
Read the environment. Move early. Stay measured. Adjust as it changes.
Boardrooms. School runs. International travel. AGMs. Public events. Private homes. We move with you — your day, your business, your people, uninterrupted.
Veteran-Led. Operationally Tested.
Grant Killen leads Concentric Concepts with the calm authority that comes from doing the work, not just managing it. He converts high-risk situations into clear, composed action — shaped by twenty five years across defence, specialist policing, and high-risk private contracting.
Operational Background
Royal Australian Navy Clearance Diver
Private Contracting in high risk environments
Security Consulting – specialist protective support for landowner engagement and stakeholder relations
Queensland Police – Explosive Ordnance Response Team (EORT) Technician, Dignitary Protection specialist, firearms and operational safety instructor
Licences, Standards & Professional Credentials
Certified Australian Veteran Owned Business (AVOB)
Data and system controls implemented in line with the intent of the Australian Cyber Security Centre’s Essential Eight framework
Fully insured for the security services we provide, including sensitive and higher-risk operational environments
Third-Party Certified for Quality, Safety & Environmental Management
ISO 9001 | ISO 45001 | ISO 14001
Certified. Accountable.
Held to the Highest Standard.
Concentric Concepts is proud to be certified across three internationally recognised ISO standards, accredited through Global Compliance Certification (GCC) under the JAS-ANZ accreditation scheme.
