Technology Principal (Security) in London

Version 1 has celebrated 30 years in business and continues to be trusted by global brands to deliver technology and transformation solutions that drive customer success. Our deep expertise enables our customers to navigate the rapidly evolving technology landscape. We foster strong partnerships with global technology leaders including Microsoft, AWS, Oracle, Red Hat, OutSystems, Snowflake, ensuring that our customers are provided with the highest quality solutions and services.

As a Technology Principal (Security), you'll work directly with our largest government and financial services clients to solve their most complex digital and security challenges, applying critical thinking to break down problems and identify practical solutions — with performance, scalability, security, and resilience built in from the start. You might start your week reviewing a detection engineering strategy for a major government department, spend time with a delivery team working through threat modelling on a live service, then present a secure cloud architecture to a client's senior leadership team.

Your background building and deploying enterprise-scale digital services in regulated and security-conscious environments means you can credibly advise on what works in practice, using systems thinking to understand how security decisions connect across the broader service and business context. Whether that's designing SIEM architectures and detection engineering capabilities across AWS, Azure, or Google Cloud, architecting zero trust models for hybrid and multi-cloud environments, helping a bank modernise their data platform while meeting strict regulatory requirements, or embedding AI security governance and DevSecOps practices across a delivery lifecycle — you bring both strategic thinking and hands-on experience to every situation.

You apply frameworks such as NCSC guidance, ISO 27001, and Cyber Essentials as practical tools that shape better outcomes, enabling effective security risk management, not compliance checklists. You'll collaborate with diverse teams including user researchers, product managers, software engineers, SOC analysts, and business stakeholders, taking a stakeholder-focused approach to balance different perspectives while maintaining clear focus on risk and compliance context.

Part of your time will involve business development — presenting to potential clients, shaping security-led value propositions, writing technical proposals including sizing and estimation work, and helping win new work that supports business growth across your accounts. You'll need to balance priorities across multiple engagements, often working to tight deadlines.

As part of our central architecture team, you'll work alongside experienced peers who share your passion for solving complex technical challenges. The role offers excellent opportunities for continuous learning through our internal communities, representing Version 1 at conferences and industry events, and working directly with clients on cutting-edge security programmes. You'll also play an active role in shaping how Version 1 approaches emerging risk domains — including AI security governance and the convergence of exposure management and detection engineering — as the threat landscape continues to evolve.

Essential Requirements

• Progression from practitioner to accountability — you have a proven modern software and security background with strategic thinking abilities and a learning mindset, progressing to take responsibility for complex, scaled deliveries with solution architecture experience and security at its core.
• Large organisation delivery experience — you have ideally delivered solutions for government departments or major financial institutions in environments with strict security, compliance, and governance requirements, which may include leading teams of architects or technical specialists.
• Hands-on technical experience — you have built and deployed enterprise-scale digital services using modern approaches (microservices, APIs, hybrid and secure cloud platforms including AWS, Azure, and Google Cloud, data architecture, and system integration) with demonstrable application of zero trust principles, secure design patterns, SIEM architecture, security observability, and DevSecOps practices across the delivery lifecycle.

Highly Desirable

• Government security and assurance experience — particularly GDS/GOV.UK or similar user-centred design approaches, HMG security policy, Government Security Classifications, and assurance processes such as GovAssure or programmes requiring SC clearance.
• Technical breadth and security leadership — experience across multiple domains including detection engineering, threat and exposure management, identity and access management, and AI security governance, with team leadership and mentoring experience.
• Active in the security and technical community — staying current with technology trends, engaging with partners such as Microsoft on platform evolution, and contributing to professional development through knowledge sharing, publications, or industry bodies such as CREST or ISACA.

Why Version 1?

At Version 1, we believe in providing our employees with a comprehensive benefits package that prioritises their wellbeing, professional growth, and financial stability. Share in our success with our Quarterly Performance-Related Profit Share Scheme, where employees collectively benefit from a share of our company's profits. Strong Career Progression & mentorship coaching through our Strength in Balance & Leadership schemes with a dedicated quarterly Pathways Career Development programme. Flexible/remote working, Version 1 is tremendously understanding of life events and people’s individual circumstances and offer flexibility to help achieve a healthy work-life balance. Financial Wellbeing initiatives including; Pension, Private Healthcare Cover, Life Assurance, Financial advice and an Employee Discount scheme. Employee Wellbeing schemes including Gym Discounts, Bike to Work, Fitness classes, Mindfulness Workshops, Employee Assistance Programme and much more. Generous holiday allowance, enhanced maternity/paternity leave, marriage/civil partnership leave and special leave policies. Educational assistance, incentivised certifications, and accreditations, including AWS, Microsoft, Oracle, and Red Hat. Reward schemes including Version 1’s Annual Excellence Awards & ‘Call-Out’ platform. Environment, Social and Community First initiatives allow you to get involved in local fundraising and development opportunities as part of fostering our diversity, inclusion and belonging schemes.

Version 1 is an equal opportunities employer. We are committed to building a diverse, inclusive and respectful workplace where everyone feels valued and able to thrive. We welcome applications from people of all backgrounds, identities and lived experiences, and we value the different perspectives people bring.

We want every candidate to have a positive and accessible recruitment experience. If you need reasonable adjustments at any stage of the process, please contact your recruiter at Version 1. We will consider all requests carefully, respectfully and confidentially.