Senior L3 Infrastructure Engineer needed at The Key Recruitment Group

What You’ll Do:

• 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 optimization.

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 optimize security solutions with Darktrace, Zscaler, and CrowdStrike.

DevOps & Cloud Optimization

• 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.

What You Bring to the Table

• Proven experience in enterprise IT support and infrastructure engineering.
• Advanced expertise in Windows Server, Linux, VMware, Citrix, Entra AD, M365, and  Azure.
• Strong knowledge of backup & DR (Veeam, iLand, replication, cloud disaster recovery).
• Deep networking expertise (Cisco, Meraki, VPNs, VoIP, Palo Alto, Brocade Fibre).
• Hands-on experience with Ivanti Security Control, Darktrace, Zscaler, and CrowdStrike.
• SQL administration skills, including Power BI and database optimization.
• Experience in DevOps, scripting (PowerShell, Python), and automation.
• Strong leadership, mentoring, and project management capabilities.
• Preferred Certifications: MCSE, VCP, CCNP, Citrix CCE-V, ITIL, Veeam VMCE.