Senior Infrastructure Engineer - Cloud & Security

Gist; Basingstoke; On-site; GBP 55,000 - 77,000; Full time

Benefits offered by this job

M&S discount

Annual leave 25 days

Healthcare plan

Bonus scheme

Pension

Wellbeing support

Cycle to work

Job summary

Gist is seeking an experienced Infrastructure Engineer to modernise our technology estate, spanning on‑prem, Azure and security. You will shape infrastructure strategy, drive governance and implement robust identity solutions while collaborating with internal teams, MSPs and partners.

You will design and support secure, resilient networks, improve IAM across AD/ADFS/Entra ID, implement MFA and PAM, and automate with PowerShell and Linux scripting.

Qualifications

• Extensive experience securing enterprise infrastructure environments.
• Strong knowledge of Active Directory, ADFS, Microsoft Entra ID, MFA and Conditional Access.
• Experience with IAM and PAM.
• Strong Windows Server and Red Hat Enterprise Linux administration experience.
• Experience with Microsoft Azure and hybrid cloud environments.
• Knowledge of enterprise networking, wireless networking, firewalls and network segmentation.
• Experience in infrastructure security, hardening and vulnerability management.
• A track record of delivering infrastructure projects and meaningful technology improvements.
• Experience using PowerShell / Linux scripting to automate and simplify.
• Strong troubleshooting and problem solving skills.
• Experience working with managed service providers and third-party technology partners.
• A proven ability to deliver practical, measurable improvements to security.
• The ability to assess technical risk and make pragmatic decisions that improve security without compromising operational stability.

Responsibilities

• Shape infrastructure strategy by assessing and modernising existing platforms.
• Design, build and support on‑premises and Microsoft Azure infrastructure.
• Improve IAM across Active Directory, ADFS and Microsoft Entra ID, implementing MFA, Conditional Access and PAM.
• Build resilient networks across LAN, wireless, SD-WAN and internet, with segmentation and secure remote access.
• Automate processes using PowerShell and Linux scripting; mentor colleagues and lead escalation for complex issues.

Skills

Active Directory

ADFS

Microsoft Entra ID

MFA

Conditional Access

PAM

Windows Server

RHEL

Azure

Hybrid Cloud

Networking

Firewalls

Network Segmentation

Security Hardening

Vulnerability Mgmt

PowerShell

Linux Scripting

Troubleshooting

Managed MSPs

Security Improvements

Job description

Gist is seeking an experienced Infrastructure Engineer to modernise our technology estate, spanning on‑prem, Azure and security. You will shape infrastructure strategy, drive governance and implement robust identity solutions while collaborating with internal teams, MSPs and partners.

You will design and support secure, resilient networks, improve IAM across AD/ADFS/Entra ID, implement MFA and PAM, and automate with PowerShell and Linux scripting.