Description

About the Role

We are seeking a Senior Wintel Infrastructure Engineer to join a high-performing Network and Server Infrastructure team. This is a critical technical role responsible for the design, implementation, and ongoing management of enterprise Microsoft environments across a hybrid infrastructure.

You will play a key role in delivering a major cybersecurity uplift program, ensuring secure, scalable, and compliant Windows-based platforms across both on-premises and Microsoft Azure environments.

Team & Environment

You will be part of a collaborative Infrastructure team consisting of:

• Infrastructure Manager
• Infrastructure Team Lead
• Server & Network Engineers
• System & Network Administrators
• Cloud Engineers

You will report to the Infrastructure Team Lead and work closely with:

• Cyber Uplift Project Team
• System Integration Vendors
• Cyber Implementation Lead

We're looking for a proactive team player who takes ownership and can effectively self-manage their workload.

Key Responsibilities
Infrastructure Engineering

• Design, deploy, and maintain enterprise-grade Wintel environments
• Administer Microsoft Active Directory (AD) and Microsoft Entra ID
• Develop and manage Group Policy Objects (GPOs)
• Support hybrid cloud environments (on-premises & Azure)
• Ensure system performance, availability, and patch compliance

Cybersecurity Uplift (Core Focus)

• Implement and manage Multi-Factor Authentication (MFA)
• Deliver passwordless and phishing-resistant authentication solutions
• Apply system hardening standards across endpoints
• Maintain role-based security groups aligned to least privilege principles
• Develop secure and compliant GPO structures

Endpoint Management

• Administer Microsoft SCCM (Endpoint Configuration Manager)
• Deploy applications, task sequences, and updates
• Manage endpoint compliance, patching, and lifecycle
• Administer Microsoft Intune and enforce compliance policies

Automation & Scripting

• Develop and maintain PowerShell scripts
• Automate operational and security tasks
• Maintain script repositories with version control
• Support Infrastructure-as-Code (IaC) practices

Security, Encryption & PKI

• Configure TLS and secure communication protocols
• Harden systems by disabling insecure ciphers and protocols
• Design and manage Public Key Infrastructure (PKI)
• Manage certificates for systems, applications, and users
• Ensure secure key management practices

Operational Excellence

• Provide Level 3 support across infrastructure and security services
• Troubleshoot across hybrid environments
• Produce and maintain technical documentation (runbooks, MOPs, as-builts)
• Collaborate with cross-functional teams to improve services

Desirable Experience

• Application Control solutions (e.g. Airlock Digital)
• Microsoft Defender suite (Endpoint, Identity, Office 365)
• Azure Conditional Access policies
• Privileged Access Management (PAM)
• Microsoft Privileged Identity Management (PIM)
• Office macro security controls and signing

Working Arrangements

• Hybrid model - minimum 2 days onsite
• After-hours and weekend work required for upgrades and deployments

Why Apply?

• Work on a large-scale cybersecurity transformation program
• Exposure to modern Microsoft cloud and security technologies
• Collaborative, high-performing infrastructure team
• Opportunity to influence enterprise-wide platform and security design