Work on Technology That Protects What Matters At SiXworks, we build secure digital solutions that support Defence and National Security missions. Our teams work on complex problems where reliability, security, and speed of innovation matter. We’re looking for an Infrastructure Architect who enjoys solving difficult technical challenges and wants their work to have real operational impact. What You’ll Do As an Infrastructure Architect, you’ll help design, build, and deliver secure digital solutions in highly secure environments. You’ll work alongside engineers, architects, and delivery specialists to develop technology that enables faster, safer decision-making for critical operations. Your work may include: Technical Leadership Lead the technical design and architecture of systems and platforms. Collaborate with customers, management and stakeholders to define technical requirements and align solutions with the wider business, where appropriate. Review and guide the development of new features and innovations, ensuring they align with the overall system architecture and technical standards. Identify and implement best practices in secure computing principles, such as SBD standards, design patterns, and testing approaches. Make decisions on technical stack, tooling and product selection based on project requirements and long-term sustainability. Team Leadership & Mentorship Provide guidance, mentorship, and support to team members, helping them grow technically and professionally. Foster a collaborative team culture, encouraging knowledge sharing and continuous improvement. Provide constructive feedback and performance evaluations to team members. Project Delivery & Stakeholder Collaboration Ensure that projects are delivered on time, within scope, and with high quality. Manage risks and proactively address challenges that may impact the project deliverables. Communicate technical concepts clearly to non-technical stakeholders, customers and SLT, where required. Innovation & Continuous Improvement Stay up to date with the latest industry trends, emerging technologies, and best practices to continuously improve technical solutions. Evaluate and recommend new tools and technologies that can benefit the team's productivity and the product’s functionality. System Reliability & Performance Ensure that systems are robust, reliable, and performant by implementing monitoring and thorough testing practices. Ensure proper design principles by including and implementing disaster recovery plans and system backups. What We’re Looking For We value people who take ownership, think critically, and enjoy working as part of a collaborative team tackling complex challenges. You don’t need to tick every box, but we’re particularly interested in people with skills/experience in: Proficiency with Industry standard software and hardware. VMware, Microsoft Server Products, ASH, Elastic, backup technologies, PKI, encryption technologies, Linux, switching, routing and firewalling across multiple product stacks (Cisco, Juniper, Mellanox) Docker & Kubernetes, CI/CD Pipelines, Horizon, HPC, Horizion VDI (Omnissa), Browsedown/Browseacross products, DevOps tooling and techniques. Application integration Proven experience leading a technical team or serving as a technical mentor. Strong problem-solving skills and the ability to make informed decisions under pressure. Excellent verbal and written communication skills, with the ability to interact with both technical and non-technical stakeholders. Ability to manage and prioritize multiple tasks in a fast-paced environment. Just as important are curiosity, strong problem solving ability, and the motivation to continuously improve how technology is designed and delivered. About SiXworks SiXworks is a specialist digital innovation partner delivering secure, mission-critical technology to Defence and National Security organisations. We focus on digital experimentation, secure-by-design architecture, cloud technologies, and rapid application development to help our customers move faster and stay ahead of evolving challenges. Our team combines expertise from across technology, business, and operational backgrounds including the armed forces creating a collaborative environment where practical thinking and innovation thrive. Why Join Us Our culture is guided by six principles: Agility, Security, Innovation, Quality, Collaboration and Inclusivity our North Star for how we work. SiXworks is a leading provider of secure digital solutions, specialising in digital experimentation and focused on fail-safe-fast cutting-edge technology solutions deployed in highly secure environments. As an end-to-end digital innovation and delivery partner, we turn complex challenges into mission-critical digital advantages. This is a thrilling time for us, with ambitious plans for growth. We are looking for brilliant, experienced, driven and self-motivated people to join the team on our journey. We offer competitive salaries and a package that supports your wellbeing and development, including 25 days annual leave bank holidays, free Private Medical cover and Life Assurance, Generous pension (10% employer, 5% employee contribution), Bonus and Professional development and training support. In addition to secure parking, gym, café & restaurant on site and lots of open break out spaces. A word on UK Security Clearance Due to the secure nature of the position and working environment, you must have or be eligible to obtain Security Clearance. More details relating to UK Security Clearance can be found here: United Kingdom Security Vetting: clearance levels - GOV.UK (www.gov.uk) Interested? Please apply!