Infrastructure Tester - DV Cleared - Windows & Linux

CBSbutler Ltd.; Winchester (VA); On-site; USD 148,192 - 153,132; Full time

Job summary

CBSbutler Ltd. is seeking an experienced Infrastructure Tester with UK DV clearance to join a high-security environment. The role is full-time and onsite in Hampshire, offering a daily rate of £600–£620. You will test Windows and Linux infrastructure, ensuring security, reliability, and deployment readiness.

Responsibilities include manual testing, defect management, and end-to-end testing within an Agile SAFe delivery team. ISTQB Foundation is advantageous.

Qualifications

• Experience testing infrastructure across Windows and Linux platforms.
• Knowledge of IDAM, PKI, servers, networking and virtualization.
• Experience with manual testing, defect management, and end-to-end testing.
• Agile/Safe environment experience; ISTQB Foundation is advantageous.

Responsibilities

• Test and validate Windows and Linux infrastructure to ensure security and deployment readiness.
• Manage defects and coordinate end-to-end testing within an Agile team.

Skills

Infrastructure testing

Windows

Linux

IDAM

PKI

Virtualisation

Defect management

Agile / SAFe

ISTQB

Job description

Infrastructure Tester - DV Cleared | Windows & Linux | High-Security Environment

+ Hampshire based role

+ Full time onsite

+ £600 to £620 per day

+ Requires DV Clearance

We are looking for an experienced Infrastructure Tester to join a secure, Agile delivery team supporting critical IT infrastructure projects. You'll be responsible for testing and validating Windows and Linux infrastructure, ensuring systems are secure, reliable, and ready for deployment.

Key Skills

• Infrastructure testing experience across Windows and Linux.
• Knowledge of IDAM, PKI, servers, networking, and virtualisation.
• Experience with manual testing, defect management, and integration/end-to-end testing.
• Agile environment experience (SAFe desirable).
• ISTQB Foundation is advantageous.

Requirements

• Active UKSV DV clearance (MOD DV accepted).
• UK national holding a single valid UK passport.

This is an excellent opportunity to work on high-profile, secure programmes within a collaborative technical team.