About Us
People first. Purpose led. Performance driven. Helping you thrive.
C5 is the only Channel Islands provider deploying a full suite of Advisory, Technology and Assurance solutions to transform our clients’ businesses.
Our vision is to be the long-term trusted advisor and respected partner to our clients, known for helping people and businesses to thrive — whether driving strategic transformation, enhancing operational security or unlocking new opportunities through technology.
By combining our deep sector knowledge, local expertise and access to global capabilities through our partnerships—including our top-tier relationship with Microsoft—we provide businesses with cutting-edge solutions that maximise performance and efficiency.
Our Multi-disciplinary Approach
From strategy to delivery, we help you move with clarity, confidence, and control.
- Strategic advisory and sector-specific insight
- Implementing technology that drives change
- Proactive support for lasting performance
Advise
Our advisory services provide clarity on options, opportunities, and the best routes forward. We leverage deep sector expertise and global partnerships to deliver insights that drive informed decision-making.
Transform
Our professional services teams—spanning Cloud & Infrastructure, Data & AI, and Applications—create, implement, and manage technologies that drive digital transformation, enhancing business productivity and profitability.
Run
Our IT Services teams go beyond traditional support. By proactively monitoring systems, we anticipate and prevent issues before they arise, ensuring continuous service improvement and operational excellence.
Our Ethos
Our work is collaborative, value-driven and always tailored to your organisation’s goals. We believe real progress starts with clear thinking and focused action.
Define bold ambitions
Deliver quick wins
Scale success with agility
We believe in a strategic yet agile approach to digital and business transformation, ensuring every initiative is relevant, impactful, and aligned with long-term success.
Think Big
We collaborate closely with key stakeholders, facilitating strategic alignment to help businesses create new sources of value, empower their workforce, reinvent processes, and harness technology effectively. We take the time to understand your unique challenges, providing clarity on the best way forward.
Start Small
We focus on delivering manageable, high-impact changes, breaking larger initiatives into smaller components to de-risk delivery and build momentum for adoption. We focus on continuous improvement and a compelling roadmap for high-impact digital solutions.
Move Fast
By embedding governance, value, and accelerated adoption into every transformation process, we enable organisations to execute their strategies with speed and confidence. We deliver relevant, lasting digital transformation that positively impacts users and organisations over time.
Environmental Social and Governance Strategy
Careers
Environmental Social and Governance Strategy
In today’s rapidly evolving world, sustainability is not just a responsibility but a necessity for long-term success.
Our Environmental, Social, and Governance (ESG) strategy is at the core of our operations, guiding us to create positive impacts on the environment, our communities, and our stakeholders.
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Latest News & Insights
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IT support for States of Guernsey
IT support for States of Guernsey staff will be provided by C5 Alliance from 1st August 2025, as part of a new two-year agreement. Following its decision to terminate its contract with Agilisys, this agreement with C5 Alliance is the first as part of the government’s new multi-vendor model; meaning services and projects will be delivered by a range of providers rather than one.
Embracing the Future of Design in an AI-Powered World
As AI-powered tools like ChatGPT redefine how we interact with technology, professionals across industries are reflecting on how their skills and roles need to evolve to stay relevant and impactful.
Cyber-Secure IT
C5 Alliance Delivers Cyber-Secure IT for a Changing Threat Landscape. By taking a multi-layered detection approach, our enhanced Managed Services proposition is designed to give our clients greater peace of mind
We act as the catalyst for your IT operations helping you run faster, safer, and smarter.
We deliver measurable business outcomes
The C5 Difference
We act as the catalyst for change, not just deliveryUnique Multidisciplinary Approach
Strategy, technology and support, delivered as oneDeep Sector Insight
We understand your world and your challengesTechnology with a Human Focus
We bring clarity, not complexity, and always start with people.