Senior IT Infrastructure Engineer

Onyx-Conseil; City Of London; On-site; GBP 80,000 - 100,000; Full time

Job summary

A leading insurance company in London is seeking a Senior IT Infrastructure Engineer for a 6-month contract with potential for extension. The ideal candidate will have over 5 years of experience, strong knowledge of Microsoft technologies, and hands-on experience with Azure and Microsoft 365. Excellent troubleshooting and communication skills are essential. This role offers immediate start and competitive daily rates.

Qualifications

• 5+ years’ experience in a senior infrastructure role.
• Strong knowledge of Microsoft technologies.
• Hands-on experience with Azure and Microsoft 365.

Responsibilities

• Design, implement, and maintain enterprise infrastructure solutions.
• Lead infrastructure upgrades and migration projects.
• Provide 3rd line support for complex technical issues.
• Ensure system security and performance across all platforms.
• Collaborate with cross-functional teams to deliver IT services.
• Document processes, configurations, and procedures.

Skills

Microsoft technologies

Azure

Microsoft 365

Security & backup tools

Virtualisation

Excellent troubleshooting

Strong communication

Education

Relevant certifications (MCSE, Azure Solutions Architect, ITIL)

Tools

ZScaler

Mimecast

Commvault

VMware

Hyper-V

PowerShell

Terraform

Job description

Job Title:Senior IT Infrastructure Engineer

Location:London (onsite)

Rate:£500-£525/day (inside IR35)

Contract:6 months initial (with strong potential to extend or move permanent)

Start Date:Early October (immediate availability preferred)

Overview

This is a high-profile contract with a leading London-based insurance company, starting early October. The role offers a 6-month initial engagement with the strong potential to extend or transition into a permanent role. We’re seeking a skilled Infrastructure Engineer with proven experience in cloud and enterprise technologies, who is adaptable, eager to learn, and keen to grow with the organisation.

Key Responsibilities

• Design, implement, and maintain enterprise infrastructure solutions (on-prem and Azure cloud).

• Lead infrastructure upgrades and migration projects.

• Provide 3rd line support and act as an escalation point for complex technical issues.

• Ensure system security, compliance, and performance across all platforms.

• Collaborate with cross-functional teams to deliver robust and scalable IT services.

• Document processes, configurations, and procedures.

Essential Skills & Experience

• 5+ years’ experience in a senior infrastructure role.

• Strong knowledge of Microsoft technologies (Exchange, Active Directory, Windows Server).

• Hands-on experience with Azure and Microsoft 365.

• Security & backup tools: ZScaler, Mimecast, Commvault.

• Virtualisation (VMware, Hyper-V).

• Excellent troubleshooting and problem-solving skills.

• Strong communication and stakeholder engagement.

Desirable

• Certifications: e.g. MCSE, Azure Solutions Architect, ITIL.

• Experience with automation tools (PowerShell, Terraform).