Senior Infrastructure Administrator
hace 3 días
Preston
Are you ready to shape the future of secure network and server infrastructure across a global organisation? At Expleo, we’re expanding our UK Infrastructure Team and looking for a skilled Senior Infrastructure Engineer who thrives in a hands‑on technical environment. If you’re passionate about designing resilient networks, solving complex challenges, and playing a critical role in large‑scale technology operations, this is the opportunity for you. What’s in It for You? • High‑impact work supporting secure, enterprise‑level servers & networks across UK and global teams, • A role where your expertise directly influences network & server performance, resilience, and security, • Opportunities to collaborate with talented engineers across Expleo’s global 3‑tier network structure, • Real ownership of architecture, troubleshooting and continuous improvement initiatives, • A culture built on collaboration, innovation and professional growth, • Design, deploy, and maintain functional LAN, WLAN, WAN & server infrastructure environments, • Configure and install network devices, servers, routers and supporting technologies, • Monitor network integrity, performance and security across multiple UK sites and assist colleagues across different geographies when required, • Troubleshoot complex issues escalated by the team and independently resolve them, • Implement and automate network tasks to improve efficiency, • Mentor and guide team members on technical topics, • Develop, test and oversee security solutions—including authentication and disaster recovery, • Maintain full documentation of all systems, configurations and processes, • Identify areas for optimisation relating to capacity, scalability and performance, • Maintain strong level of technical security for UK network & server infrastructures, participate in vulnerability assessments, remediations, security audits, prepare and provide evidence if required, • Maintain high levels of governance and compliance with both internal and external controls. i.e. Cyber Essentials Plus and ISO27001, • Bachelor’s degree in Computer Science, Engineering or a related field, • Professional certifications such as CCNA, CCNP (Security, Firewall specialisms highly valued), • Strong background in network administration, switching and routing, • Excellent troubleshooting skills with the ability to work independently, • Strong grounding in Active Directory and policy management, • Knowledge of PAN-OS, SD WAN, Cisco IOS and Extreme Network operating systems, • Strong understanding of security frameworks and access control models, • Azure server and related services build, configuration and maintenance, • Managing backups Azure / Veeam, • Client device deployment / patching (Azure Arc / SCCM / WSUS / Intune), • Technical knowledge, support, troubleshooting of MS on premises Active directory infrastructure & related services - international scale if possible – (domain controllers, DFS, GPO, replication, etc), • Knowledge of MS Cloud services and relationships with on premises infrastructure (EntraID, AD connect), • Knowledge of Microsoft 365 architecture, support, troubleshooting at least small scale (UK only), ideally international scale., • Organisational skills with a track record of mentoring colleagues, • Experience using diagnostic, monitoring and network analysis tools, • Experience working with Windows and Linux Servers Hyper‑V, VMWare., • Experience with firewall configuration and management (Palo Alto preferred), • Hands‑on experience with TCP/IP and routing protocols including BGP and OSPF, • Collaborative working environment – we stand shoulder to shoulder with our clients and our peers through good times and challenges, • We empower all passionate technology loving professionals by allowing them to expand their skills and take part in inspiring projects, • Always working as one team, our people are not afraid to think big and challenge the status quo, • As a Disability Confident Committed Employer we have committed to:, • Ensure our recruitment process is inclusive and accessible, • Communicating and promoting vacancies, • Offering an interview to disabled people who meet the minimum criteria for the job, • Anticipating and providing reasonable adjustments as required, • Supporting any existing employee who acquires a disability or long term health condition, enabling them to stay in work at least one activity that will make a difference for disabled people “We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age”. We treat everyone fairly and equitably across the organisation, including providing any additional support and adjustments needed for everyone to thrive #J-18808-Ljbffr