Systems Administrator in Leeds

Systems Administrator
Duration: 12 Months
Location: Hybrid – Remote working with one day per week in Wales
Rate: £500 per day
Start: ASAP
IR35 Status: Inside
Role Overview
We require an experienced Systems Administrator to support a major cyber security and operational technology (OT) uplift programme within a regulated environment.
This role will focus on secure configuration, system management, and the integration of key technologies across a complex infrastructure. You will play a key role in strengthening security posture, improving system hardening practices, and supporting the roll out of critical security tools already in progress.
Essential Skills & Experience:
As the Systems Administrator you will possess the following:
A trong background in IT systems administration (HND level or equivalent experience)
* Hands-on experience with:
Windows Server, Linux (RedHat preferred), SQL Server
Networking (Cisco routers/switches, TCP/IP)
* Experience managing and configuring Active Directory
* Proven ability to manage multiple priorities and projects simultaneously
* Excellent analytical and problem-solving skills
* Strong communication and stakeholder engagement skills
* Experience working within structured frameworks (e.g. ITIL)
Desirable:
* Experience in a regulated environment (e.g. NIS-CAF)
* Knowledge of OT environments, including:
SCADA systems
PLCs and telemetry systems
Kerberos
* Understanding of industrial process control systems
* Awareness of Health & Safety and CDM regulations
* Experience within utilities or infrastructure sectors
Key Responsibilities include:
To support cyber programme activities, delivering infrastructure changes aligned to recognised security frameworks (e.g. E-CAF), across:
Windows & Linux servers
SQL databases
Network infrastructure (including Cisco)
WAN services and data centres
* Improve system patching and secure configuration in line with vulnerability management standards
* Drive system hardening best practices, including:
Development and deployment of \’gold build\’ standards
Retrofitting security controls to existing systems
* Investigate and resolve incidents and problems, ensuring minimal disruption to business-critical systems
* Support the roll out and configuration of security technologies, including:
Network intrusion detection systems
Endpoint Detection & Response (EDR)
Enterprise backup solutions
* Collaborate on documentation for secure management of IT and security tooling within an OT environment
* Ensure robust User Acceptance Testing (UAT) prior to system releases
* Strengthen Identity & Access Management processes, including Joiner/Mover/Leaver workflows
* Support implementation and ongoing management of Active Directory, including identity governance
* Manage system changes within an ITIL-based framework
* Work with internal teams and third-party suppliers to implement cyber and physical security controls
* Deliver work in line with governance standards, project timelines, cost, and quality expectations
* Able to work in a collaborative, multi-disciplinary environment
If this role is of interest, please email your CV to:
Certes Computing (and all of its subsidiary companies) is committed to promoting equality and diversity in its business operations.

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