Senior ICT Infrastructure Specialist

Amiosec is an exciting and growing UK technology company with innovation, agility, and state of the art technology at its core. We work in partnerships with UK government customers and commercial providers to deliver research, technology, products, and services in the communications security sector. This is an important role for our organisation and will be instrumental in helping us to support the continued growth of our business through the delivery of successful outcomes to our customers. Due to the nature of our work, all candidates will be required to obtain and maintain an appropriate UK security clearance Working in collaboration and with Project Delivery teams across the business supporting delivery outcomes for all stakeholders and customers. Responsibility for infrastructure development and continuous improvement including updating policies, procedures, controls and guidelines for Information Security. Maintaining the Information Security Management System, including supporting internal & external audits for ISO 27001 and Cyber Essentials Plus. Proactively identifying IT needs, proposing solutions and acting on them. Identifying risks and taking steps to mitigate them. Provide risk-based direction for future system enhancements. Management and definition for policies, procedures and guidelines (PPGs). Provide support for internal IT computing infrastructure – hardware and software environments, internal & external-facing networks, performance, monitoring, reporting and continual patch maintenance ensuring security of systems. Working with Managed Services to continue developing ITIL service culture ensuring timely updates and resolution of tickets within SLAs. Provide technical assistance, fault diagnostics and IT support. Previous experience as an Infrastructure Engineer or Systems Engineer – ideally a minimum of 3 years Experience with multi-vendor enterprise IT infrastructure, installation, design, configuration and troubleshooting/support of computer, storage, networking, physical infrastructure and software. Experience managing technical service environments and delivering services in line with internal and external SLAs. Experience of Information Security and controls to mitigate threats within secure IT environments. Experience of working to CIS, Microsoft, NCSC, ISO27001 and Cyber Essentials Plus frameworks. Networking knowledge and concepts including switching, routing, firewalls, load balancing, TCP/IP, VPN/VLAN, Routing, Enterprise Wi-Fi, DHCP, DNS, IP Addressing, WAN, LAN. Experience maintaining and troubleshooting Windows/Linux server and desktop platforms – Windows 10/11, Windows Server 2019/2022/2025, Ubuntu, and Debian. Experience with Active Directory, AD CS, GPO Management, Office 365, Azure, EntraID, Intune, Autopilot and WSUS Technologies. Experience with virtualisation software Hyper-V, Proxmox or VMware. Experience of supporting IT Platforms that maintain differing software applications across, Development, Engineering, Finance, IT, Sales, etc. Experience of Linux software such as Nginx, OpenSSL, FreeIPA. Experience within house monitoring tools such as the ELK Stack. Experience with developing and maintaining air gapped networks. Experience with Service Desk and Customer Support Tools. At Amiosec, we value our employees and offer a comprehensive benefits package, including: ~ Life Insurance – X4 Salary ~ Private Health Scheme with no medical history checks, excess, or treatment limits ~ EV Salary Sacrifice scheme ~ Salary Sacrifice Company Pension, matched up to 10% ~ 25 Days Holiday + Bank/Public Holidays ~ 5 holiday hours ~ Cycle to Work scheme ~ Coffee & Cake mornings every fortnight ~ Enhanced Maternity & Paternity leave ~ Free on-site parking Free fruit in the office Health & Wellbeing program