The Defence Industry Security Program (DISP) requires members to secure their entire supply chain, not just internal operations. If a third-party vendor breaches your data, the Department of Defence holds you accountable. Meeting DISP supply chain security requirements demands proactive due diligence, mandatory contractual clauses, and rigorous management of third-party access to sensitive environments.
Introduction to DISP and Supply Chain Risk
Supply chain risk is the exposure introduced by external vendors handling your critical data. Under the DISP framework, SMEs must extend their security perimeter to include subcontractors and IT providers. You must demonstrate that any entity touching Defence information maintains security controls commensurate with your own DISP membership level. Failure to do so places your membership and Defence contracts at risk.
The primary threat vector for Defence data is no longer direct attacks on primary contractors, but compromises of less secure secondary suppliers. Implementing strong supply chain security prevents downstream vulnerabilities from compromising classified or official information.
Key Requirements for Supplier Due Diligence
Due diligence requires assessing a vendor's security posture before granting them access to Defence data or systems. You must verify that their technical controls, governance structures, and personnel vetting align with DISP mandates. This involves reviewing their security policies, independent audit reports, and incident history.
When evaluating suppliers, implement a formal, documented assessment process. Do not accept self-attestation for critical vendors. For detailed guidance on preparing your organisation, review our DISP Readiness services.
| Vendor Type | Due Diligence Action | Verification Artifact |
|---|---|---|
| Cloud Service Providers | Verify IRAP assessment status and ISM alignment. | Cloud Security Assessment Report |
| Managed IT Services (MSP) | Assess Essential Eight maturity and personnel clearances. | Independent Audit Report |
| Subcontractors | Review physical and logical data protection controls. | Completed Security Questionnaire |
Contractual Clauses and Security Flow-Down Provisions
Security flow-down provisions legally bind your subcontractors to the same DISP requirements mandated in your Defence contracts. Your contracts must explicitly dictate data handling procedures, mandatory security frameworks, and immediate incident notification timelines. Without enforceable legal clauses, you have no mechanism to compel compliance or audit third-party practices.
Ensure your vendor agreements include the following mandatory clauses:
- Mandatory compliance with the Information Security Manual (ISM).
- Requirements to meet a specific maturity level under the Essential Eight framework (refer to our compliance services for implementation help).
- Strict timelines for reporting suspected or actual cyber security incidents (e.g., within 24 hours).
- Right-to-audit clauses permitting you or an independent assessor to verify controls.
Managing Third-Party Access to Defence Information
Third-party access management restricts vendor access to only the specific data and systems required to perform their contracted duties. You must implement the principle of least privilege, enforce multi-factor authentication, and monitor vendor activity. Unfettered or persistent access to your entire network introduces unacceptable risk.
Implement role-based access controls (RBAC) and conduct quarterly access reviews. When a vendor contract terminates, immediately revoke all physical and logical access. Retain access logs for a minimum of 18 months, as mandated by ISM guidelines, to support post-incident investigations.
Incident Response Planning Across the Supply Chain
Supply chain incident response defines how you coordinate, communicate, and remediate a breach originating from a third-party vendor. You must document clear escalation paths and establish predefined communication protocols with both the vendor and Defence. A delayed or uncoordinated response severely amplifies the impact of a third-party breach.
Your Incident Response Plan (IRP) must explicitly include scenarios for supplier compromise. Test this plan annually using tabletop exercises that involve key personnel from your primary IT providers. Ensure all parties understand their obligations regarding containment, forensic data preservation, and regulatory reporting.
Frequently Asked Questions
What is DISP supply chain security?
DISP supply chain security requires Defence Industry Security Program members to ensure their downstream vendors and service providers protect Defence information. It involves due diligence, contractual clauses, and ongoing monitoring.
Do our subcontractors need to be DISP members?
Not necessarily, but if they handle sensitive Defence information, you are responsible for ensuring they meet the same security standards mandated by your DISP membership level, often achieved through contractual flow-down provisions.
How do we manage IT service provider risks under DISP?
IT providers must be assessed against the Essential Eight and Information Security Manual (ISM). You must enforce security controls through binding contracts and verify their compliance through independent assessments or audits.