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Thames Water Logo Thames Water · IT - Administration

Operational Technology (OT) Compute System Engineer

United Kingdom, Reading 65000.00 GBP / Year · Job Posted May 30, 2026
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Job Description

As an Operational Technology (OT) Compute System Engineer, you will be responsible for managing and supporting OT-specific enterprise systems and applications. These business-critical systems play a key role in enabling operational technology services for both the end customer and the wider business. This role involves ensuring that all systems under the compute remit remain compliant, secure, and aligned with industry standards. You will contribute to the resolution of infrastructure issues and help deliver new solutions as required by the business.

Job Responsibility

  • Support the ongoing maintenance and lifecycle management of existing OT compute infrastructure, including patching and license management
  • Work closely with business stakeholders to understand and deliver new technical solutions, including cloud-based technologies, in support of future needs
  • Act as a key point of contact for incident response, demonstrating strong problem-solving skills and the ability to act quickly under pressure
  • Assist in the design and implementation of infrastructure changes, including both high-level and low-level technical designs
  • Ensure domain system security compliance through audits, reviews, and proactive management
  • Support the delivery of regular updates across the full technology stack, including application, OS, BIOS, and hypervisors
  • Administer and support a wide range of enterprise technologies, including Active Directory, SCCM, VMware, Symantec Endpoint Protection, Dell OpenManage Enterprise, Canonical patching tools, NTP, PKI/certificates, and hybrid Azure environments
  • Contribute to the integration and evolution of Industry 4.0 solutions within the OT compute domain
  • Participate in an out-of-hours on-call rota (following probation and prerequisites) to provide emergency support for critical OT systems
  • Support and collaborate with other technical teams in delivering infrastructure improvements and new deployments
  • Stay current with industry best practices and demonstrate the ability to act as a Subject Matter Expert (SME) within the compute domain
  • Engage in personal development and training to ensure capability across required technologies
  • You will be required to be a part of our mandatory standby for our 24/7 support in this role

Requirements

  • Higher education qualification (HNC or equivalent experience) in an engineering or IT discipline
  • Proven experience in maintaining, patching, and supporting infrastructure and enterprise systems
  • Security clearance to SC level
  • Familiarity with enterprise application administration, including Active Directory, SCCM, VMware, AV software, and Azure cloud services
  • Knowledge of IP communications and networking, including LAN and WAN
  • Understanding of industry-specific SCADA systems, or willingness to learn
  • Proficient scripting skills using PowerShell or similar
  • Strong interpersonal and communication skills
  • confident in dealing with both technical and non-technical stakeholders
  • Proven decision-making skills and the ability to balance operational, commercial, and customer needs
  • Understanding of IT and OT delivery approaches (e.g., ITIL, Agile, Waterfall, Lean)
  • Self-motivated, detail-oriented and able to work under pressure
  • A driving licence is essential for this position

Nice to have

  • Microsoft Certified Solutions Associate (MCSA) – Server, SQL, SCCM
  • Microsoft Applied Skills – Administer Active Directory Domain Services
  • Microsoft Azure Fundamentals and/or Azure Administrator Certification
  • Experience in scripting and automation using PowerShell
  • VMCE certification or hands-on experience with Veeam Backup & Replication (or similar)
  • Symantec Endpoint Protection (SEP) administration certification
  • Prior experience working within the utility industry or a large-scale enterprise environment (>20,000 devices)
  • Experience with stakeholder analysis and managing relationships across multiple technical and business teams
  • Security Clearance: CTC (Counter Terrorist Check) clearance is desirable

What we offer

  • Competitive salary up to £65,000 per annum, depending on experience
  • Car allowance - £4,500
  • Annual Leave - 26 days holiday per year, increasing to 30 with the length of service (plus bank holidays)
  • Performance-related pay plan directly linked to both company and individual performance measures and targets
  • Generous Pension Scheme through AON
  • Access to lots of benefits to help you take care of yourself and your family's health and wellbeing, and your finances – from annual health MOTs and access to physiotherapy and counselling, to Cycle to Work schemes, shopping vouchers and life assurance
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