Support our Scotland manufacturing site and Chromalloy’s global infrastructure team. You’ll combine hands-on on-site support with Tier III engineering and security-focused improvement of our Tiger proprietary system. Working pattern: Hybrid (1–2 days on-site, 3–4 remote), aligned to GMT/BST Location: Glasgow, Scotland facility (TSL) Reporting line: Regional EU/UK IT Manager About the role We’re looking for a Global Senior IT Systems Administrator to support our TSL manufacturing facility in Scotland and the wider Chromalloy global infrastructure team. This hybrid role (1–2 days on-site, 3–4 remote) blends hands-on site support with Tier III engineering and security-focused improvement of our Tiger proprietary system. What you’ll do Be the on-site Tier III escalation point for TSL Scotland, supporting infrastructure, networking and end-user computing. Provision, image, troubleshoot and refresh desktops/laptops. Maintain and troubleshoot site networking and connectivity (switching, Wi‑Fi, cabling and corporate links). Support on-site servers/storage including patching, monitoring and performance optimisation. Partner with site leadership to prioritise incidents/requests and deliver small projects. Maintain IT asset security and compliance, including physical security and access controls. Support meeting room/AV and collaboration tools. Provide Tier III support to the global infrastructure team and administer core platforms (Windows Server, AD/Entra ID, VMware, Azure/AWS and enterprise networking). Resolve complex issues across sites; contribute to security monitoring, backup/DR/business continuity, and migrations/upgrades. Lead end-to-end vulnerability remediation for the Tiger proprietary system: plan and prioritise with the Tiger SME/IT Security, apply patches/hardening, document architecture/dependencies, and report progress and risk reduction. What we’re looking for 5–7 years’ experience in enterprise IT infrastructure/systems administration and/or network engineering. Strong Tier III troubleshooting skills across servers, identity, networking and endpoints. Hands-on experience with several of: Windows Server, Active Directory/Entra ID, VMware, Azure/AWS, and enterprise networking (e.g., Cisco/Palo Alto or equivalent). Proven vulnerability remediation and security hardening (patching, configuration, CVE prioritisation, change control). Working knowledge of cybersecurity frameworks (NIST 800-171, CMMC) and operating in controlled environments. Clear communicator who’s comfortable collaborating across time zones and documenting work. Able to work independently, manage priorities and keep stakeholders updated. Able to work hybrid, with 1–2 days per week on-site at TSL Scotland. Eligible for security vetting appropriate to a defence contracting environment. Nice to have Certifications (e.g., Microsoft, CCNA/CCNP, Security/CySA or similar). Security tooling experience (e.g., CrowdStrike, Rapid7, SailPoint or equivalent). Regulated environment experience (e.g., ITAR/EAR) and its impact on IT systems/data handling. Aerospace, defence or manufacturing IT background. Exposure to OT/IT convergence or proprietary industrial/engineering systems. Scripting/automation (e.g., PowerShell) and a continuous improvement mindset. ITIL Foundation (or practical ITSM/change management experience). Working pattern Hybrid: 1–2 days per week on-site at TSL Scotland; the remainder remote. Some work in industrial/production areas (PPE provided as required). Occasional travel to other Chromalloy sites for projects, training or collaboration. Hours aligned to GMT/BST, with occasional out-of-hours support for critical incidents or planned maintenance. Participation in an on-call rota may be required. What we offer We offer a competitive package including base salary, annual bonus eligibility, pension contributions, private medical insurance, and professional development support (including certification reimbursement, salary depending on skills and experience. How to apply Submit your CV/resume and a short cover note highlighting your infrastructure and security experience. If shortlisted, we’ll contact you with next steps.