IT L3 Infrastructure Engineer at The Key Recruitment Group

Job Description

• As an L3 Engineer, you’ll be the go-to technical expert, handling the most complex challenges and leading critical infrastructure projects. You’ll drive IT optimisation, automation, and strategic improvements, ensuring seamless operations in a high-pressure, business-critical environment

Key Responsibilities:
Advanced Technical Support & Troubleshooting

• Act as the final escalation point for complex IT issues and critical system failures
• Perform deep-dive troubleshooting across Windows, Linux, VMware, Citrix, M365, Azure AD, SQL, and DevOps environments
• Lead root cause analysis (RCA) for high-impact incidents, implementing long-term solutions
• Optimise and troubleshoot enterprise mobility (Ivanti Neurons, UEM, UMS, iPads, tablets)
• Mentor and support L1/L2 engineers, sharing expertise and best practices

Infrastructure & System Architecture

• Manage and optimise Windows Server (2016, 2019, 2022), Linux, Active Directory, Exchange (2016/2019/Online), and SharePoint (2016/Online)
• Oversee and enhance virtualization platforms (VMware ESX, vCenter, Citrix XenApp/XenDesktop, Netscaler, RSA, FSLogix)
• Architect and maintain backup & disaster recovery solutions (Veeam Backup, Replication, iLand, Veeam One, Veeam Monitor)
• Configure and manage SANs, HP Servers, replication, UPS, and high-availability environments
• Deploy and utilize PRTG Enterprise Monitoring to improve incident management and system optimisation

Networking & Security

• Lead network troubleshooting and optimization (DNS/DHCP, routing, switching, Meraki, SilverPeak, VPNs, VoIP, Brocade Fibre, Palo Alto, HPE, Cisco)
• Strengthen enterprise security policies, ensuring firewall, VPN, and cloud security best practices
• Collaborate with network architects to design and implement secure, scalable IT solutions
• Deploy and optimise security solutions with Darktrace, Zscaler, and CrowdStrike

DevOps & Cloud Optimisation

• Manage and support DevOps pipelines (GitHub, GitLab, Azure DevOps, Visual Studio, Python, Visual Basic)
• Automate infrastructure tasks using PowerShell, Python, or other scripting tools
• Optimise SQL environments (SQL 2016/2019, DBA, Reporting Services, Integration Services, Power BI, Analysis Services)

Project Leadership & Continuous Improvement

• Lead infrastructure projects, including cloud migrations, security hardening, automation, and system upgrades
• Develop and implement best practices for patch management, performance tuning, and compliance
• Collaborate with senior leadership and C-level stakeholders to shape IT strategy
• Drive service improvements, capacity planning, and performance monitoring using ServiceNow ITSM
• Document solutions, create runbooks, and enhance IT operational workflows