DESIGN & BUILD
Comprehensive, end-to-end capability to architect, engineer, and implement your cybersecurity defences.
Governance & Assurance
Implement comprehensive frameworks that enable you to understand, measure, and improve your organisation’s cybersecurity effectiveness.
Operate & Evolve
Enable your organisation to securely operate today while continuously evolving your cyber resilience for tomorrow.
Managed ServiceS
Your frontline defence partner, providing always-on, expert-led cyber defence that continuously protects your organisation from threats.
About Dev/Null
We are Dev/Null, UK-based cyber security specialists focused on designing, building, and running security services that work.
We help enterprises protect their most valuable assets from sophisticated threats.
Our consultants bring decades of frontline experience from defending high-value, high-risk environments. We combine that expertise with a practical approach — helping you improve visibility, strengthen defences, and operate with confidence.
From security architecture and engineering to control effectiveness monitoring, managed services, and regulatory advisory, we act as an extension of your team, ensuring that your security investments deliver measurable results and lasting resilience.
Our mission is simple: to make effective cyber security achievable for every organisation that depends on it.
Our Services
Design & Build, Governance & ASsurance, OPerate & Evolve, Managed Service
Why Choose Us
Responsive
We stay flexible and adapt to your priorities, whether that means shifting focus within a project or responding to an emerging threat to provide the best security for you. Our fast-turnaround, communication, and flexible engagement models keep you moving forward without delays.
Established
Our team brings deep operational experience developed across a broad range of industries and security domains, backed by proven industry and vendor certifications, and a portfolio of real-world successes. That depth of knowledge lets us solve complex problems with confidence and speed.
Evolving
Continuous learning is at the core of our culture: we routinely assess, refine, and re-engineer our processes, tools, and skills to stay ahead of the threat landscape. This mindset translates into more effective, efficient, and resilient solutions for you.
Enabling
Beyond delivering services, we actively coach your staff, sharing best practices, conducting workshops, and providing hands-on training to mature your capability. The result is an empowered internal team that can sustain and expand the gains we deliver.
Sustainable
We design security architectures and practices that endure, focusing on long-term resilience rather than quick fixes. By embedding best practices, automating controls, and aligning with your business roadmap, we foster a culture of continuous improvement.
Actionable
Complex cybersecurity concepts are distilled into plain language, ensuring every stakeholder, from executives to engineers, understands the risks, options, and recommended actions. This clarity drives informed decisions and smooth collaboration across your organisation.
What Our Clients Say
"Not only have our Dev/Null consultants delivered above and beyond their ask, but they have helped upskill and mentor our permanent colleagues - they have been a force multiplier, and we simply would not be where we are without them. They are fully embedded in our team and are helping us transform the bank all the way from SecOps, to Cryptographic Services, to I&AM."
"Tremendous partners, deeply skilled operators in their own right"
Head of Security Solutions Architecture, Global Bank