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# 3rd Line Infrastructure Engineer - SC Cleared

- **Company:** Modis
- **Location:** Derby, UK
- **Experience:** Experienced
- **Salary:** £45,000.0 - £52,000.0
- **Contract:** Permanent contract
- **Skills:** Active Directory, Antivirus Softwares, Domain Name System (DNS), Monitoring of Systems, Kerberos (Protocol), Lightweight Directory Access Protocols (LDAP), Enterprise Messaging Systems, Windows Servers, Citrix Systems, Public Key Infrastructure, Windows PowerShell, SSL Certificate Management, SC Clearance, Vmware
- **Published:** October 24, 2026
- **Apply:** https://www.reed.co.uk/jobs/3rd-line-infrastructure-engineer-sc-cleared/57489127

## About the Role

We're looking for someone who can demonstrate strong technical expertise combined with excellent communication and problem-solving skills., * Current SC Clearance with eligibility to undertake DV clearance.

 * Proven experience operating in a 3rd Line Infrastructure or Managed Services environment.
 * Extensive Microsoft Windows Server administration experience.
 * Strong Active Directory expertise, including GPOs, DNS, LDAP, Kerberos, delegation and trust relationships.
 * VMware and virtualisation technologies.
 * Exchange administration.
 * PKI and certificate management.
 * PowerShell scripting and automation.
 * Strong analytical and troubleshooting capabilities.
 * Ability to work independently and make sound technical decisions

Desirable Skills

Experience with any of the following would be advantageous:

 * Citrix technologies
 * Messaging platforms
 * Ivanti Device Control
 * SecureEnvoy 2FA
 * Nexthink
 * Endpoint security and anti-virus platforms
 * Enterprise monitoring and infrastructure management tools, If you're a skilled Infrastructure Engineer with a passion for delivering high-quality technical solutions and want to work on challenging, business-critical systems, we'd love to hear from you.

## Description

An exciting opportunity has arisen for an experienced 3rd Line Infrastructure Engineer to join a highly secure, enterprise-scale environment supporting business-critical services. This position offers the chance to work with cutting-edge Microsoft infrastructure technologies within a collaborative technical team, helping to maintain, improve and modernise a complex IT estate.

This role is ideal for a technically capable engineer who enjoys solving challenging infrastructure issues, contributing to technical projects and working within a security-conscious environment where reliability and service excellence are paramount., As a 3rd Line Infrastructure Engineer, you'll provide advanced support across a large-scale Microsoft-based infrastructure, acting as an escalation point for complex technical issues while supporting ongoing platform development and improvement initiatives., * Providing expert-level troubleshooting and incident resolution.

 * Delivering solutions and workarounds to minimise service disruption.
 * Supporting and maintaining critical Windows Server environments.
 * Managing and prioritising multiple technical tasks and projects.
 * Collaborating closely with customers, stakeholders and wider technical teams.
 * Reviewing service performance and identifying opportunities for improvement.
 * Supporting infrastructure deployments, upgrades and enhancements.
 * Participating in an on-call support rota.