Whether you run a mid-sized enterprise or manage a multi-site operation across Australia, security threats are continuously evolving. A structured security risk assessment helps organisations understand what they are protecting, identify potential threats, evaluate vulnerabilities, and implement effective controls to reduce risk.
A robust security risk assessment provides more than a list of potential problems. It creates a clear, defensible framework for decision-making, helping organisations prioritise security investments, improve resilience, and meet governance expectations.
The process outlined below aligns with ISO 31000:2018 (Risk Management — Guidelines) and incorporates security risk management guidance from SA HB 167:2025 (Managing Security-Related Risks), providing a recognised methodology for Australian businesses.
Step 1: Establish the Scope, Context, and Criteria
Before identifying risks, establish the parameters of the assessment. This ensures the process remains focused, relevant, and aligned with organisational objectives.
Define the Scope
Determine what will be included in the assessment, such as:
- Physical locations, facilities, and surrounding environments
- Digital systems, networks, and information assets
- Operational processes and critical business functions
- Third-party suppliers, contractors, and service providers
Establish the Context
Understand the internal and external factors that may influence security risk. This may include:
- Business operations and dependencies
- Site-specific conditions and location risks
- Regulatory obligations, including the Australian Privacy Act 1988 and relevant Work Health and Safety requirements
- Industry-specific security expectations and operational challenges
Define Risk Criteria
Establish how risks will be measured and evaluated. This includes determining the organisation’s risk appetite, acceptable levels of exposure, and the criteria used to prioritise treatment actions.
Why it matters:
A poorly scoped assessment can create blind spots and result in ineffective recommendations. Engaging key stakeholders from areas such as facilities, operations, legal, and management ensures the assessment reflects the organisation’s actual risk environment.
Step 2: Identify Threats, Vulnerabilities and Existing Controls
With your assets mapped, identify what could harm them. In the Australian context, this includes both physical threats:
- Operational threats — human error, insider risk, contractor access
- Environmental threats — bushfire, flood, extreme heat (highly relevant in Australia)
- Technical vulnerabilities — outdated software, weak access controls, poor network segmentation
Also document existing controls already in place — access management, staff training, incident response plans. A security consultant will benchmark these against industry standards and any obligations under the Australian Privacy Act 1988 or sector-specific regulations.
Step 3: Risk Analysis and Risk Evaluation
After identifying risks, each risk scenario must be analysed and evaluated to determine its significance and priority.
Risk Analysis
Risk analysis involves understanding the nature and level of each identified risk by considering:
Likelihood
How probable is the risk event occurring, considering existing controls and operating conditions?
Consequence
What would be the potential impact on people, assets, operations, reputation, financial performance, or regulatory obligations?
The results are typically assessed using a risk matrix that combines likelihood and consequence to determine an overall risk rating.
Risk Evaluation
Risk evaluation compares the analysed risks against the criteria established during the first step. This helps organisations determine which risks require treatment and which can be monitored or accepted.
High and critical risks that exceed organisational risk tolerance should receive priority attention.
Documenting assumptions, evidence sources, and decision-making processes ensures the assessment remains transparent, auditable, and defensible for stakeholders, insurers, and regulatory purposes.
Step 4: Determine and Implement Risk Treatment Plans
Risk treatment involves selecting and implementing measures to modify risks that are considered unacceptable.
Under ISO 31000, common risk treatment options include:
Mitigate (Reduce)
Implement controls that reduce the likelihood or consequence of an incident. This may include:
- Improved access control systems
- Security procedures and training
- Physical security upgrades
- CPTED-based environmental improvements, including enhanced natural surveillance, territorial reinforcement, and safer access arrangements
Avoid
Change or discontinue activities that create unacceptable security exposure.
Share (Transfer)
Allocate or share responsibility for risk through mechanisms such as:
- Insurance arrangements
- Contractual agreements
- Specialist security providers
Retain (Accept)
Formally accept lower-level risks that fall within established risk tolerance, while continuing to monitor them.
For each treatment option, organisations should develop a clear action plan outlining:
- Required resources
- Responsible owners
- Target completion dates
- Expected outcomes
- Performance measures
Effective risk treatment focuses on practical improvements that align security requirements with business operations.
Step 5: Monitor, Review, and Ongoing Communication
Security risk management is not a one-time exercise. Threats, technology, business operations, and regulatory expectations continue to change, making ongoing monitoring and review essential.
An effective review cycle should include:
Scheduled Reassessments
Review security risks regularly, such as annually or following significant changes to:
- Business operations
- Facilities or locations
- Technology systems
- Supply chain arrangements
Post-Incident Reviews
Analyse security incidents, near misses, and control failures to determine whether improvements are required.
Ongoing Communication
Maintain communication between leadership, operational teams, and security advisors to ensure risk information remains current and treatment actions continue to support business objectives.
Recording and Reporting
Maintain clear documentation of:
- Identified risks
- Existing controls
- Treatment decisions
- Review outcomes
- Changes to the risk environment
Accurate records support accountability and help demonstrate that security risks are being actively managed.
Practical Tips for Australian Businesses
Secure Leadership Support
Security improvements require appropriate resources and decision-making authority. Executive involvement helps ensure risk treatment plans receive the required support and investment.
Consider Site-Specific Factors
Every organisation faces different security challenges. Consider factors such as location, surrounding environment, operational requirements, supply chain dependencies, and workforce access patterns.
Maintain Defensible Documentation
Clear records of the assessment process, decisions, and improvements provide valuable evidence for governance, insurance, and regulatory requirements.
Review Risks Regularly
A security risk assessment should evolve alongside your business. Schedule regular reviews and reassess risks after major operational, technological, or environmental changes.
Book Your Security Risk Assessment with CPTED Australia
A structured security risk assessment helps organisations move from reactive security measures to proactive risk management. By understanding threats, evaluating vulnerabilities, and implementing appropriate controls, businesses can make informed decisions that strengthen resilience and protect what matters most.
Whether you require an independent security assessment or guidance in developing an internal risk management framework, CPTED Australia provides specialised security risk assessment services tailored to your operational environment.
Need help getting started? Reach out today or call (02) 9191 9771 to schedule your consultation and take the guesswork out of security risk management.
About the Author
Simon Pollak is the Principal Consultant at CPTED Australia. He is a Fellow of the Australian Security Industry Association (FASIAL), a Certified Information Systems Security Professional (CISSP), holds a Master of Cyber Security, and is a licensed security consultant. His practice covers CPTED assessments, security risk assessments and security strategy for developments and venues across Australia.