Senior Systems Administrator - SC Clearance Needed

Mayfleet Recruitment Limited; England; On-site; GBP 50,000 - 80,000; Full time

Job summary

A leading recruitment agency is seeking an experienced senior systems administrator to support and secure complex enterprise systems and networks. The role includes administering core systems, managing cloud services like Azure and AWS, and providing leadership within the infrastructure team. The ideal candidate will have significant experience in IT environments and expertise with firewalls, VPNs, and active directory management, ensuring stable and resilient infrastructure services.

Qualifications

• Significant experience as a senior systems administrator in complex IT environments.
• Strong background in infrastructure engineering.
• Expertise in virtualisation with Hyper-V and Virtual Machine Manager.
• Proficiency in cloud service management with Azure, AWS, and Google Cloud.
• Experience with Veeam for backup and continuity operations.
• Strong administrative skills in Microsoft 365 applications.
• Experience with Citrix environments.
• Advanced skills in Active Directory.
• Experience with Fortinet technologies.

Responsibilities

• Provide leadership and technical guidance in systems administration.
• Administer and maintain core technical systems including Firewalls and VPNs.
• Manage virtualisation platforms and perform lifecycle management of VMs.
• Support backup and recovery processes using Veeam.
• Deliver engineering services across hybrid environments.
• Maintain cloud services and associated security configurations.
• Enhance enterprise monitoring solutions for proactive issue detection.
• Support incident response and continuous service improvement.

Skills

Senior systems administration

Infrastructure engineering

Firewalls

Load balancers

VPNs

Azure

AWS

Google Cloud

Active Directory

Citrix

Veeam

Virtualisation platforms

Monitoring tools

Analytical skills

Problem-solving

Tools

SolarWinds

Fortinet products

Hyper-V

Microsoft 365

Job description

CANDIDATES REQUIRE CURRENT, ACTIVE SC CLEARNACE FOR THIS ROLE - PEASE APPLY ACCORDINGLY

Role Purpose

The role requires an experienced technical professional to support, enhance, and secure complex enterprise systems and networks. Working as a senior systems administrator, the postholder will ensure the stability, resilience, and continuous improvement of both on-premises and cloud-based infrastructure services.

Key Responsibilities

• Serve as a senior team member within systems administration, providing leadership, technical guidance, and hands‑on support across critical infrastructure services.
• Administer and maintain core technical systems including Firewalls, load balancers, VPN solutions, wireless networks, LAN infrastructure, and associated security technologies.
• Manage virtualisation platforms such as Hyper‑V and Virtual Machine Manager, including configuration, performance optimisation, and life‑cycle management of virtual machines.
• Support backup, recovery, and business continuity processes using Veeam.
• Deliver robust infrastructure engineering services across hybrid environments, supporting on‑premises systems and cloud platforms such as Azure, AWS, and Google Cloud.
• Administer cloud services including Azure cloud resources, Microsoft 365 (Teams, Exchange, SharePoint, etc.), and associated identity and security configurations.
• Maintain and enhance enterprise monitoring solutions, including SolarWinds, to ensure proactive issue detection and service optimisation.
• Support and manage Citrix environments, contributing to application delivery, performance tuning, and secure remote access capabilities.
• Perform advanced administration of Active Directory, including group policies, identity life‑cycle management, and domain services.
• Conduct Firewall administration tasks such as rule optimisation, policy configuration, troubleshooting, patching, and logging/analysis.
• Provide expertise in deploying, configuring, and maintaining Fortinet products within the network and security landscape.
• Work with cross‑functional teams to support incident response, problem resolution, and continuous service improvement.
• Produce and maintain clear technical documentation, operational procedures, and configuration standards.

Essential Experience & Skills

• Significant, proven experience operating as a senior systems administrator or technical leader in complex IT environments.
• Strong infrastructure engineering background with hands‑on experience across Firewalls, load balancers, VPNs, wireless networks, and LAN technologies.
• Expertise with Hyper‑V, Virtual Machine Manager, and virtualised infrastructure administration.
• Experience with Veeam for backup, restore, and continuity operations.
• Proficiency with Azure, AWS, Google Cloud, and wider cloud administration.
• Strong administration capabilities across Microsoft 365, including Teams, Exchange, and related services.
• Experience using SolarWinds or similar monitoring tools.
• Administration and support experience of Citrix environments.
• Advanced skills in Active Directory management and configuration.
• Experience working with Fortinet technologies, including deployment, management, and troubleshooting.
• Strong analytical, problem‑solving, and stakeholder communication skills.