Senior Infrastructure Engineer - Wintel

We're looking for a skilled Senior Infrastructure Engineer with focus on Wintel to play a key role in shaping and supporting the technology that underpins our clients' success. You'll bring deep expertise in infrastructure technologies, with a clear understanding of the latest industry developments and future strategies. The role is permanent, based on-site, 3 days a week in Salisbury or Portsdown West (Portsmouth) and requires DV security clearance. Maybe required to vary hours to cover 8am-6pm service. What you will be doing: Provide technical support for Windows Server environments both on-premise and in the cloud Working autonomously or within a team to troubleshoot and resolve complex server, network, and infrastructure issues within agreed SLA's. Manage Active Directory, Group Policy, DNS, DHCP, and other core Windows services. Oversee and support server patching, upgrades, and maintenance in line with security and compliance standards. Monitor system performance and implement improvements to ensure high availability, performance and reliability. Work with 1st and 2nd line support teams to escalate and resolve incidents within agreed SLA's Maintain and update documentation for systems, processes, and procedures. Assist in disaster recovery planning and testing. Support virtualization technologies (VMware) and cloud (AWS and Azure. Ensure compliance with IT policies, standards, and best practices. Assist in project planning and execution for infrastructure upgrades and migrations, working with Architects and Project Managers. What you will bring: Strong understanding of Windows Server technology on-premise and in the cloud Working knowledge of Group Policy Objects, Sites and Services, Role Based Access Models Experience configuring Active Directory Forests and Domains but also exposure to Entra, Active Directory Federated Services, PIM and PAM approaches An understanding of key monitoring metrics that indicate the health and performance of Microsoft Server Technologies to enable proactive support Experience using or keenness to learn about automation Virtualisation experience If you are interested in this role but not sure if your skills and experience are exactly what we're looking for, please do apply, we'd love to hear from you! Although this role is advertised as full-time, we support different ways of working and can offer a range of flexible working arrangements. So, if you're interested and need to work flexibly, we encourage you to apply and talk to us about what might be possible. Employment Type: Full-time, Permanent Location: Salisbury or Portsmouth - on-site Security Clearance Level: holding SC or eligible for SC clearance, willing to undertake DV clearance Internal Recruiter: Lee Salary: £42k-£52k Benefits: 25 days annual leave with the option to buy additional days, health cash plan, life assurance, pension, and generous flexible benefits fund (3% of base salary). Although this role is advertised as full-time, we believe that flexibility at work can promote work/life balance, increase your motivation, reduce stress and improves performance and productivity. We support different ways of working and can offer a range of flexible working arrangements. So, if you're interested and need to work flexibly, we encourage you to apply and talk to us about what might be possible. Loved reading about this job and want to know more about us? Sopra Steria's Aerospace, Defence and Security business designs, develops and deploys digital solutions to Central Government clients. The work we do makes a real difference to the client's goal of National Security, and we operate in a unique and privileged environment. We are given time for professional development activities, and we coach and mentor our colleagues, sharing knowledge and learning from each other. We foster a culture in which employees feel valued and supported and have pride in their work for the customer, delivering outstanding rates of customer satisfaction in the UK's most complex safety- and security-critical markets. We embrace difference as a source of creativity, innovation and competitive advantage and are striving to become a more diverse organisation. We welcome applications from people with a diverse variety of backgrounds and identities. We are committed to equality of opportunity for all and do not discriminate on the basis of race, religion, colour, gender, age, disability, sexual orientation or marital status. We have partnered with Vercida , the UK's largest diversity and inclusion focused careers site, where all our vacancies are available in an accessible format. If you require any adjustments to the recruitment process, to enable you to perform to the best of your ability, please let us know when completing your application. We participate in the Disability Confident scheme and are committed to offering an interview to any candidate with a disability, who meets the minimum criteria for the role. If you believe this could apply to you, please let us know when completing your application.

Location: UK, GB

Posted Date: 11/22/2025