Senior Infrastructure Administrator

ASSYSTEM; United Kingdom; Hybrid; GBP 50,000 - 80,000; Full time

Job summary

Assystem seeks an IT Infrastructure Manager to oversee the management of cloud and local environments, ensuring the health and evolution of critical systems. This role will impact low-carbon infrastructure projects, offering a dynamic working environment with opportunities for hybrid working, and various benefits, including a strong pension scheme.

Benefits

Hybrid Working Opportunity

Pension scheme (8% company contribution / 4% personal contribution)

25 days’ paid annual leave + bank holidays

Professional fees reimbursed

Flexible working hours

Employee referral scheme

Qualifications

• 5+ years' experience in infrastructure or system administration.
• Hands-on experience with Azure and Microsoft 365.
• Skilled in managing VMs and cloud services.

Responsibilities

• Manage endpoints, servers, mobile devices, and storage infrastructure.
• Administer Azure environments and support Microsoft 365.
• Monitor system performance and enforce IT compliance standards.

Skills

Infrastructure Management

Azure Administration

Microsoft 365 Support

Troubleshooting

Virtual Machines Deployment

Documentation

Education

ITIL Certification

Tools

PowerBI

GitHub

Azure DevOps

Job description

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Job Description

This role ensures the health and evolution of our IT infrastructure estate.
You’ll manage both cloud and locally hosted environments.
Your future team will support national infrastructure across key engineering programmes.

• Manage endpoints, servers, mobile devices, and storage infrastructure
• Administer Azure environments, including provisioning and storage configurations
• Support Microsoft 365 tenant setup, licensing, and administration
• Deploy virtual machines and configure hypervisors across environments
• Troubleshoot Office 365 and mobile device technical issues
• Assist with cloud-based collaboration tools (PowerBI, GitHub, Azure DevOps)
• Maintain documentation for procedures, changes, and system states
• Monitor system performance and enforce IT compliance standards

Qualifications

Essential Skills

• 5+ years' experience in infrastructure or system administration
• Hands-on experience with Azure and M365 environments
• Ability to manage and deploy endpoints, VMs, and cloud services
• Skilled in Microsoft Office and mobile device support
• Strong troubleshooting and infrastructure performance monitoring abilities
• Experience with VM hypervisors and cloud-based provisioning
• Knowledge of collaboration platforms like PowerBI and GitHub
• Ability to document procedures and maintain IT compliance

Desired Skills

• Microsoft “Fundamentals” and Azure, Power Platform, or Data certifications
• Knowledge of VMware systems and templates
• Familiarity with SolarWinds or similar IT tools
• Understanding of Azure DevOps environments
• ITIL Certification or equivalent process framework

Additional Information

Why You Should Apply

Be part of Assystem’s digital transformation, enabling secure and scalable systems that support critical UK energy missions. Your work will have real impact across low-carbon infrastructure projects shaping a sustainable future.

Benefits include:

• Hybrid Working Opportunity
• Pension scheme (8% company contribution / 4% personal contribution)
• 25 days’ paid annual leave + bank holidays + option to buy or sell days
• Professional fees reimbursed
• Flexible working hours
• Employee referral scheme

We are committed to equal treatment of candidates and promote diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter! Bring your unique contributions and help us shape the future.