Defence Cyber Certification for Software and IT Suppliers

DCC Level 0 and the Cyber Essentials it requires, for software and it suppliers in the defence supply chain, from one Certification Body.

Why software and it suppliers need Defence Cyber Certification

Software and IT suppliers to defence often have direct access to systems and data, which puts them squarely in scope. Defence buyers increasingly expect suppliers to evidence their cyber security through Defence Cyber Certification, and individual MoD contracts are already specifying a required level. If you supply the defence sector, or want to, DCC is becoming part of the price of entry.

The four DCC levels, and where Cyber Essentials fits

Defence Cyber Certification has four levels, set by the cyber risk profile of the contract. Level 0 is the supply chain floor for very low assessed risk and has just three controls: hold Cyber Essentials covering the contract scope, process personal data in compliance with UK GDPR, and build resilience into your systems. Level 1 jumps to 101 controls, Level 2 to 139 and Level 3 to 144, so the step from Level 0 to Level 1 is far larger than the numbering suggests. Your level is assigned by the MoD delivery team through the contract's Cyber Risk Profile rather than chosen by you. Crucially, every level requires Cyber Essentials, and Levels 2 and 3 require Cyber Essentials Plus as well. Cyber Essentials is the technical baseline for every level.

How Solusec helps

We are a Defence Cyber Certification Body appointed to assess and certify Level 0, and we are a Cyber Essentials Certification Body too, so we can certify the Cyber Essentials that Level 0 requires at the same time, with no handoffs. For Level 1 we provide scope reviews, gap analysis across the controls and evidence preparation. Level 2 and Level 3 assessments, which require Cyber Essentials Plus, we refer to a body appointed for those levels.

The defence supply chain in software and IT suppliers

Software suppliers are frequently the most technical organisations in a defence supply chain and surprisingly often the hardest to certify. The culture that makes good engineers, autonomy over your own machine and freedom to adopt tools quickly, is in direct tension with centralised device management and enforced MFA.

What software and IT suppliers suppliers most often have to fix first

These are the blockers that come up repeatedly here. All three are worth checking before you start an application, because each one is a remediation project rather than a paperwork exercise.

• Developer machines excluded from the managed estate because controls interfere with tooling.
• Cloud and CI platforms without enforced MFA for every user including service owners.
• Source control and artefact repositories treated as out of scope when they hold customer data.

None of these stops you certifying. All of them decide whether you certify in two weeks or two months, which is the difference that matters with the MoD's 31 December 2026 expectation in view.

Why this matters now

The Ministry of Defence has asked all industry partners to achieve DCC Level 0 by 31 December 2026. It is an ask rather than a contractual mandate: IASME, which runs the scheme, states that DCC is not currently mandatory, and holding it does not yet exempt you from the Supplier Assurance Questionnaire. The requirement that binds you contractually today is DEFCON 658 and the Cyber Security Model. Individual MoD contracts are already specifying a required DCC level, and you cannot bid above your certified level. Getting Level 0 and your Cyber Essentials in place now keeps you eligible and ahead of the rush.

What Level 0 looks like for a software supplier

For software suppliers the Level 0 blocker is cultural rather than technical: developer machines excluded from managed device policies, and cloud platforms without enforced MFA for every user. Both are in scope if they touch contract data, and both are quicker to fix than to argue about.