WELCOME TO SI4 SECURITY
Physical Security Consultants
​As leading physical security consultants, we empower organisations across the UK to achieve their strategic ambitions by risk mitigation and fostering resilient operations.
Welcome to Si4
Si4 is a specialist physical security consulting firm, servicing clients throughout the UK.
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Our purpose is what drives us. We exist to enable organisations to realise their strategic ambitions, by providing specialised physical security assessments and risk management consultancy services that identify, assess and mitigate risks to their strategic success.
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Together, we curate safe, secure and resilient organisations in an age of ever-changing risk.
WHAT WE DO
Physical Security Consultants & Resilience Consulting
PHYSICAL SECURITY SURVEY & RISK ASSESSMENT
Our team conduct thorough on-site evaluations and in-depth threat assessments to identify your organisation's unique vulnerabilities. We provide a comprehensive risk profile, meticulously analysing potential threats and their impact, forming the crucial foundation for robust and bespoke security strategies.
PHYSICAL SECURITY PROJECT MANAGEMENT
Leverage the expertise of our seasoned security consultants for seamless, end-to-end project management of your physical security initiatives. From initial concept and design through to implementation and handover, we ensure projects are delivered on time, within budget, and to the highest standards, optimising your investment.
PHYSICAL PENETRATION
TESTING
We conduct a range of rigorous, realistic penetration tests that simulate genuine threat scenarios. This proactive approach uncovers latent vulnerabilities in your physical defences, providing invaluable and actionable insights to strengthen your security posture before real-world incidents occur.​
PHYSICAL ASSET PROTECTION STRATEGY
Develop a resilient strategy to safeguard your critical tangible assets. We design tailored frameworks and security measures, encompassing sophisticated access control systems, advanced surveillance, and robust asset management protocols to ensure comprehensive and continuous protection for your valuable resources.
CRISIS MANAGEMENT | BUSINESS CONTINUITY & EMERGENCY PLANNING
Our expert security consultants specialise in developing resilient crisis management, comprehensive business continuity, and dynamic emergency planning frameworks. We empower you to effectively prepare for, respond to, and recover from unforeseen disruptions, minimising impact and ensuring operational resilience.