Infrastructure and Active Directory 3rd Line Engineers

Location:

Onsite near Basingstoke

Clearance:
Active DV Required

Contract:

6 months

Rate: £80 to £87 per hour

IR35:
Inside IR35

4 roles available

We are seeking an experienced Infrastructure & Active Directory Engineer to join a secure, business-critical IT environment.

This is a hands-on third-line engineering role covering Windows and Linux servers, virtualisation, storage, backup, monitoring and Microsoft Active Directory.

You will provide technical support across an established enterprise infrastructure while contributing to modernisation, upgrades and technology lifecycle projects.

Candidates should have strong experience in either infrastructure engineering or Active Directory, with good working knowledge of the other.

• Provide third-line support and resolve complex infrastructure and Active Directory issues.
• Administer Microsoft Active Directory, Group Policy, DNS, DHCP, replication and authentication.
• Support Windows Server 2016 onwards and Red Hat Enterprise Linux.
• Manage VMware vSphere and/or Hyper‑V virtualisation environments.
• Support SAN/NAS storage, backup, monitoring, clustering and disaster recovery.
• Undertake server builds, patching, upgrades and vulnerability remediation.
• Support infrastructure modernisation and migration projects.
• Perform root cause analysis and manage technical incidents and changes.
• Maintain technical documentation and follow ITIL service management processes.
• Work closely with network, security, desktop and application teams.

• Proven third-line Infrastructure or Active Directory engineering experience.
• Strong expertise in either infrastructure or Active Directory.
• Windows Server 2016 onwards administration.
• VMware vSphere (ESXi/vCenter) and/or Hyper‑V.
• Active Directory, Group Policy, DNS and DHCP.
• Experience with SAN/NAS, enterprise backup and disaster recovery.
• Working knowledge of RHEL/Linux administration.
• Familiarity with SCCM, WSUS and SCOM.
• Good understanding of networking fundamentals (TCP/IP, DNS, firewalls and routing).
• Strong troubleshooting and root cause analysis skills.
• Experience working within secure, controlled IT environments.
• Current, valid DV security clearance is essential. Candidates without DV clearance cannot be considered.

• Advanced VMware, Hyper‑V or Azure Local experience.
• RHEL hardening and Red Hat Satellite.
• Windows PKI, Entra , AD Connect or ADFS.
• Active Directory migrations and server upgrades.
• Power Shell, Python or Ansible automation.
• CIS/NCSC security baselines and air-gapped environments.
• Relevant Microsoft, VMware, Red Hat or ITIL certifications.

This is an excellent opportunity for an experienced Infrastructure or Active Directory Engineer to work within a secure enterprise environment, supporting critical services and delivering infrastructure modernisation