Senior IT Systems Engineer

MASS; Hudswell; On-site; GBP 45,000 - 65,000; Full time

Benefits offered by this job

25 days annual leave

Pension options

Private medical and dental insurance

Life assurance

Car leasing

Job summary

Mass is a security-focused technology company seeking a Senior IT Systems Engineer for an on-site role in Corsham (SN13). You will manage server infrastructure, AD, and VMware environments, with a focus on reliability and security in a highly protected air-gapped setting.

The role requires UK work eligibility and the ability to obtain DV clearance. Benefits include extensive annual leave, pension options, private medical and dental insurance, and other employee perks.

Qualifications

• Proven experience in server infrastructure support and administration.
• Strong VMware (vSphere/ESXi/vCenter) expertise.
• Hands-on Windows Server, Active Directory and Group Policy experience.
• Eligible to work in the UK and obtain UK DV clearance.
• Desirable: SharePoint 2016, Linux basics, ITIL knowledge.

Responsibilities

• Provide reliable third-line support across our secure infrastructure.
• Maintain and administer Microsoft Windows Server environments, including Active Directory.
• Support and enhance our VMware-based virtual infrastructure.
• Manage backup and recovery processes using Veeam to ensure data resilience.
• Keep technical documentation up to date and ensure change control processes are followed.

Skills

VMware

Active Directory

Windows Server

Veeam

ITIL

Linux

Group Policy

SharePoint

Security

Support

Tools

Veeam Backup & Replication

HP OneView

SharePoint 2016

Windows Server

Active Directory

Job description

Salary: £45,000 - 65,000 per year

Requirements:

• Proven experience in server infrastructure support and administration
• Solid knowledge of VMware technologies (vSphere, ESXi, vCenter)
• Hands-on experience with Microsoft Windows Server, Active Directory, and Group Policy
• Eligible to work in the UK as a UK National
• Eligible to obtain and maintain UK Government Developed Vetting (DV) clearance
• Desirable: exposure to HP infrastructure such as Synergy, OneView, and SAN
• Desirable: SharePoint 2016 support and administration
• Desirable: familiarity with Windows Server roles such as DFS, DHCP, DNS, and Clustering
• Desirable: experience with Veeam backup and replication tools
• Desirable: understanding of ITIL principles and service management
• Desirable: basic Linux knowledge

Responsibilities:

• Provide reliable third-line support, resolving incidents and troubleshooting issues across our secure infrastructure
• Maintain and administer Microsoft Windows Server environments, including Active Directory
• Support and enhance our VMware-based virtual infrastructure
• Manage backup and recovery processes using Veeam to ensure data resilience and business continuity
• Keep technical documentation up to date
• Contribute to service stability through proactive maintenance, system improvements, and adherence to change control processes

Technologies:

• Active Directory
• Support
• ITIL
• Linux
• Security
• SharePoint
• VMware
• Veeam
• Windows

More:

We are MASS, an independent, global technology company trusted by highly secure organisations to provide advanced digital services that manage data and keep information safe. With our heritage in defence, we deliver robust solutions to sectors where security expertise is essential. We work in partnership with customers using skilled technical experts and innovative, tailored, agile, and resilient solutions. This is a full-time permanent Senior IT Systems Engineer role based on site in Corsham (SN13), working in a unique, highly secure air-gapped environment. We offer a friendly workplace where everyone is valued, along with benefits including 25 days annual leave, flexible leave purchase or sale, pension options, private medical and dental insurance, life assurance, savings schemes, car leasing, cycle to work, retail discounts, continuous professional development support, and an annual wellness allowance.

last updated 40 week of 2026