Essential Steps for an Effective Security Threat Risk Assessment
- Lyon Security

- Aug 31
- 3 min read
Updated: Sep 8
A security company performs a detailed risk assessment to understand a business's specific security needs and justify their service recommendations. This comprehensive evaluation goes far beyond a simple checklist, analyzing all potential threats, vulnerabilities, and the potential impact of a security incident.
The assessment typically involves five key phases
Phase 1: Preparation and asset identification
The security company first collaborates with the business to set clear objectives, scope, and parameters for the assessment.
Define scope and objectives: The company determines the areas to be assessed, which could be the entire organization, a single location, or specific high-value departments. Objectives may include enhancing safety, ensuring regulatory compliance, or protecting against specific threats.
Identify and value assets: The security team creates a comprehensive inventory of the business's assets. This includes:
Physical assets: Buildings, offices, equipment, inventory, and other property.
Intangible assets: Intellectual property, trade secrets, client data, and brand reputation.
Human assets: Employees, executives, and clients.
Determine asset criticality: The company classifies each asset based on its value and importance to business operations. Losing a critical asset, like a security officer or a customer of the business, would have a far higher impact than losing a non-critical one like a glass door or a copy machine.

Security staff member Phase 2: Threat and vulnerability analysis
With a complete asset list, the security company identifies what could cause harm and how a threat could exploit weaknesses.
Threat identification: The security team identifies both internal and external threats that could harm the business. This includes:
External threats: Terrorists, rioters, thieves, burglars, vandals, competitors, and natural disasters.
Internal threats: Disgruntled or negligent employees, former staff, or contractors, fire, bomb, gas leak.
Vulnerability analysis: The team looks for weaknesses in the business's current defenses that a threat could exploit. A vulnerability assessment typically involves:
Physical security assessment: A site walk-through to inspect entry points, lighting, access controls, and surveillance systems.
Procedural review: Examining existing policies, such as visitor logs, key controls, and emergency plans.
Phase 3: Risk evaluation and scoring
This phase combines the threat and vulnerability analysis to calculate a risk score for each potential scenario.
Analyze likelihood: Based on collected data, the company estimates how likely a specific threat is to occur. Factors considered include location crime rates, industry threats, and historical incident data.
Determine impact: The company evaluates the potential financial, operational, and reputational damage if a threat successfully exploits a vulnerability. This is often framed in terms of business disruption or monetary loss.
Calculate risk rating: The company uses a risk matrix to assign a numerical or categorical rating (e.g., high, medium, low) for each risk by combining its likelihood and impact.
Prioritize risks: Findings are ranked by their risk level, ensuring that the highest-priority concerns are addressed first.

Risk Assessment Matrix
Phase 4: Developing a security plan
The company uses the prioritized list of risks to develop and recommend a customized security plan.
Mitigation strategy: The plan outlines security controls and measures designed to reduce the identified risks. This can include a layered approach that prioritizes the most effective measures:
Elimination: Removing a risk entirely.
Engineering controls: Installing new technology like advanced analytical cameras, on & off site CCTV monitoring or access control systems.
Administrative controls: Updating security policies, procedures, and employee training.
Protective equipment: Providing safety equipment where necessary.

Cost-benefit analysis: The security company helps the business understand the return on investment for their security spending by showing how the recommended controls reduce the potential financial impact of a security incident.
Phase 5: Documentation and review
The final stage involves creating a formal report and establishing a plan for ongoing monitoring.

Produce a risk assessment report: This document summarizes the findings, including the identified assets, threats, vulnerabilities, and prioritized risk levels. It provides a clear, actionable roadmap for the business to follow.
Continuous monitoring: Security threats are constantly evolving. The security company will recommend regular follow-up assessments to ensure the plan remains effective and adapts to new threats, business changes, or new technologies.
At Lyon Security, we offer a cost-free, comprehensive risk assessment service for residential estates, commercial, industrial and retail industries in the Cape Town area.
Contact our office: 021 300 6895
Email: mark@lyonsecurity.co.za
Website: www.lyonsecurity.co.za






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