Nationally recognised cybersecurity consultancy
KEYSIGMA has been named a finalist for SME Consultancy of the Year at The National Cyber Awards 2026.
The nomination recognises our continued growth and our commitment to delivering practical, high-quality cybersecurity consultancy, certification and assurance services.
Who We Are
KEYSIGMA® is a specialist cybersecurity consultancy and certification body based in Cheltenham. We help organisations strengthen their security, achieve respected certifications and demonstrate that they can be trusted with sensitive information, systems and supply-chain responsibilities.
As a Cyber Essentials and Cyber Essentials Plus Certification Body, these schemes sit at the heart of what we do. We combine formal certification expertise with practical, hands-on support, helping organisations understand the requirements, identify and resolve gaps, and implement the technical controls needed to achieve and maintain certification.
From small businesses taking their first steps in cybersecurity to complex multinational environments, we make the certification process clear, achievable and commercially valuable.
KEYSIGMA is also a Defence Cyber Certification Level 3 Certification Body. We support organisations in implementing the controls required by the Defence Cyber Certification framework and independently assess organisations seeking certification against the standard.
For organisations looking to develop a broader and more mature approach to information security, we provide ISO 27001 consultancy and conduct IASME Cyber Assurance Level 2 assessments. These services help organisations strengthen governance, manage risk more effectively and provide meaningful assurance to customers, partners and stakeholders.
Through Secure Innovation Security Reviews, we support start-ups and innovative businesses that may be exposed to state-linked and other sophisticated threats. We help them protect their intellectual property, sensitive information and commercial advantage.
Our wider services include information security improvement programmes and penetration testing delivered through trusted specialist partners.
We work with organisations of all sizes across the UK and internationally, from single-person businesses to multinational groups. Whatever the engagement, our focus remains the same: clear advice, high standards and practical outcomes that make a genuine difference.
The UK’s Largest Team of NCSC Assured Cyber Advisors
KEYSIGMA is one of a select group of Cyber Essentials Certification Bodies that is also an NCSC Assured Cyber Advisor provider.
With four certified Cyber Advisors, more than any other provider in the UK, we have the country’s largest team of NCSC Assured Cyber Advisors. This gives our clients access to extensive technical knowledge of the Cyber Essentials requirements, combined with the practical experience needed to support small and medium-sized organisations effectively.
Our advisors have been independently assessed as competent to provide hands-on Cyber Essentials guidance and operate in accordance with the National Cyber Security Centre’s quality and cyber-security standards. We can help your organisation understand the requirements, identify gaps in its current security controls, and plan and implement the technical improvements needed to achieve certification.
The UK’s Largest Team of NCSC Assured Cyber Advisors
KEYSIGMA is one of a select group of Cyber Essentials Certification Bodies that is also an NCSC Assured Cyber Advisor provider.
With four certified Cyber Advisors, more than any other provider in the UK, we have the country’s largest team of NCSC Assured Cyber Advisors. This gives our clients access to extensive technical knowledge of the Cyber Essentials requirements, combined with the practical experience needed to support small and medium-sized organisations effectively.
Our advisors have been independently assessed as competent to provide hands-on Cyber Essentials guidance and operate in accordance with the National Cyber Security Centre’s quality and cyber-security standards. We can help your organisation understand the requirements, identify gaps in its current security controls, and plan and implement the technical improvements needed to achieve certification.
Our Team’s Qualifications and Accreditations
Our consultants combine extensive real-world cybersecurity experience with respected professional qualifications across technical security, audit, assurance and certification.
Our Approach
We believe effective cybersecurity should enable organisations to operate with confidence, not create unnecessary barriers.
Our approach is practical, proportionate and focused on real outcomes. We take the time to understand each organisation’s systems, risks, objectives and commercial priorities before recommending or assessing the controls that apply.
Whether we are supporting a client through certification, strengthening its information security arrangements or carrying out an independent assessment, we communicate clearly and work collaboratively throughout the engagement.
We pride ourselves on being responsive, straightforward and easy to work with. Our aim is not simply to complete an assessment, but to leave every organisation stronger, better informed and more confident in its cybersecurity.
Our Approach
We believe effective cybersecurity should enable organisations to operate with confidence, not create unnecessary barriers.
Our approach is practical, proportionate and focused on real outcomes. We take the time to understand each organisation’s systems, risks, objectives and commercial priorities before recommending or assessing the controls that apply.
Whether we are supporting a client through certification, strengthening its information security arrangements or carrying out an independent assessment, we communicate clearly and work collaboratively throughout the engagement.
We pride ourselves on being responsive, straightforward and easy to work with. Our aim is not simply to complete an assessment, but to leave every organisation stronger, better informed and more confident in its cybersecurity.
Of particular importance to us was their flexibility. One of our team members is an Armed Forces Reservist and, to support their service commitments, works flexible hours. Key Sigma were completely understanding of this and tailored the timing of the sessions around their availability.
That level of support, flexibility and understanding made a real difference to us. We would happily recommend Key Sigma to any organisation looking for professional, approachable and supportive guidance through the accreditation process.
Alice did everything via Teams (a site visit was offered as well) and we got through everything efficiently.
I'm pleased to say we passed without any issues and will continue to work we KeySigma in the future
James
In 2 Networks, Newton Abbot
Highly recommended.
Trusted by the Organisations We Support
Customer satisfaction is central to the way we work. We aim to make every engagement clear, responsive and straightforward, while providing practical advice that delivers real value.
Our five-star Google reviews reflect the positive experiences of the organisations we support and the care, professionalism and expertise our team brings to every client relationship.
Trusted by the Organisations We Support
Of particular importance to us was their flexibility. One of our team members is an Armed Forces Reservist and, to support their service commitments, works flexible hours. Key Sigma were completely understanding of this and tailored the timing of the sessions around their availability.
That level of support, flexibility and understanding made a real difference to us. We would happily recommend Key Sigma to any organisation looking for professional, approachable and supportive guidance through the accreditation process.
Alice did everything via Teams (a site visit was offered as well) and we got through everything efficiently.
I'm pleased to say we passed without any issues and will continue to work we KeySigma in the future
James
In 2 Networks, Newton Abbot
Highly recommended.
Customer satisfaction is central to the way we work. We aim to make every engagement clear, responsive and straightforward, while providing practical advice that delivers real value.
Our five-star Google reviews reflect the positive experiences of the organisations we support and the care, professionalism and expertise our team brings to every client relationship.
Quality Is at the Heart of Everything We Do
Delivering a consistently high standard of service is fundamental to the way KEYSIGMA operates. Since 2021, we have maintained a UKAS-accredited ISO 9001 quality management system, helping us embed clear processes, continual improvement and accountability across our work.
This commitment to quality supports everything from how we manage client engagements to how we review our services, respond to feedback and ensure that our customers receive a professional, reliable and consistently positive experience.
Quality Is at the Heart of Everything We Do
Delivering a consistently high standard of service is fundamental to the way KEYSIGMA operates. Since 2021, we have maintained a UKAS-accredited ISO 9001 quality management system, helping us embed clear processes, continual improvement and accountability across our work.
This commitment to quality supports everything from how we manage client engagements to how we review our services, respond to feedback and ensure that our customers receive a professional, reliable and consistently positive experience.
Our Memberships
Connected to our industry and our community
KEYSIGMA is proud to be a member of ADS, the UK trade association representing the aerospace, defence, security and space sectors. Through our membership, we are part of a network of more than 2,000 organisations supporting some of the UK’s most strategically important industries.
We are also a member of the Cheltenham Chamber of Commerce, supporting and engaging with the business community in our home town of Cheltenham. The Chamber has represented the local business community for more than 120 years.
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