Senior Systems Engineer

Tetra Tech; Greater London; Hybrid; GBP 85,000 - 115,000; Full time

Job summary

Tetra Tech is seeking a Senior Systems Engineer II to shape resilient IT infrastructure across cloud, datacentre and on-prem environments. You will influence technical direction, drive automation and governance, and ensure secure, cost-effective platforms.

Hybrid work with monthly office visits to our Slough data centre underpinning delivery and operational excellence. You will lead complex projects, collaborate with vendors and senior stakeholders, and mentor teammates to raise maturity across

Qualifications

• Senior-level experience in systems administration, infrastructure engineering or similar technical role.
• Degree in Computer Science, Information Technology or equivalent practical experience.

Responsibilities

• Design, optimise and govern critical infrastructure across datacentre, cloud and on-premises platforms.
• Define technical direction and improve operational maturity, security and cost-effectiveness.
• Lead complex infrastructure projects, manage risk, budget and timelines, and communicate with stakeholders.
• Mentor colleagues and support knowledge transfer for smooth implementation and handover.

Skills

Infrastructure Strategy

Technical Leadership

Automation

Documentation

Incident Response

Education

Bachelor's degree in Computer Science or IT

Tools

Docker

VMware

Commvault

Citrix

Job description

Ready to shape resilient, secure and high-performing IT infrastructure in a technically demanding environment? This is a senior opportunity for an accomplished Systems Engineer II who enjoys solving complex infrastructure challenges, influencing technical direction and improving platforms across cloud , datacentre and on-premises environments .

Purpose & Scope of the Role

As Senior Systems Engineer II , you will play a pivotal role in designing, optimising and governing critical infrastructure across datacentre, cloud and hybrid environments. You will help define technical direction, improve operational maturity, and ensure platforms remain secure, reliable and cost-effective. This role combines strategic oversight with deep technical delivery, supporting infrastructure architecture , automation , incident response, compliance , documentation, operational handover and project execution.

Your Impact in this position

You will influence the stability, performance and future shape of core IT services. Working closely with technical teams , vendors and stakeholders, you will identify opportunities to modernise systems, reduce manual effort, strengthen governance and improve service resilience. Your expertise will help ensure infrastructure decisions are aligned to business priorities, security expectations, operational standards and long-term value.

Core Capabilities

• Infrastructure Strategy & Design: Design, maintain and optimise enterprise infrastructure to deliver high availability, performance and reliability across cloud, datacentre and on-premises platforms.
• Technology Evaluation & Adoption: Assess emerging and advanced infrastructure technologies, recommend fit-for-purpose solutions and support adoption of platforms that improve operational effectiveness.
• Technical Leadership & Enablement: Provide clear technical direction, mentor colleagues and support knowledge transfer to ensure smooth implementation and operational handover.
• Documentation, Standards & Governance: Maintain technical documentation, define standards and support consistent processes that strengthen operational quality and compliance.
• Automation, Resilience & Incident Response: Drive automation, improve provisioning and workflows, and support incident response approaches that protect service integrity and reduce manual intervention.
• Project Delivery & Stakeholder Engagement: Lead complex infrastructure projects, manage risk, budget and timelines, and communicate confidently with stakeholders and senior leadership.

Skills, Qualifications and Experience

You will bring substantial senior-level experience in systems administration, infrastructure engineering or a similar technical role, ideally supported by a degree in Computer Science, Information Technology or equivalent practical experience.

You will also have:

• Hardware Expertise: Advanced understanding of enterprise-grade servers (Cisco UCS Chassis and Blades, Dell), storage solutions and configurations (Pure, Qumulo), and data centre networking (Cisco switches).
• Cloud File Storage Solutions: Proficiency in managing cloud file storage platforms such as Nasuni, Azure Files, Qumulo, and Egnyte.
• Cloud Infrastructure Management: Significant experience with virtual machines, storage, networking, containerisation (Docker), and AI technologies on platforms including Azure and AWS.
• Virtualisation Technologies: Expert-level knowledge of VMware and other hypervisor environments.
• Operating Systems Expertise: Thorough familiarity with Windows and Linux operating systems.
• Backup and Recovery Solutions: Hands-on expertise with enterprise backup solutions, particularly Commvault.
• Scripting and Automation: Strong skills in PowerShell scripting, enabling effective task automation and system management.
• DaaS: Hands-on expertise with VDI solutions (Citrix and VDA)
• Comprehensive understanding of LAN, WAN, network security protocols, and firewall configuration.
• In-depth expertise in Cisco networking technologies and protocols, including TCP/IP, Fibre Channel, iSCSI, Storage Zoning, and FCoE.

Working Environment

The position is based on a hybrid model, mainly working from home but with monthly visits to an office or fully hybrid if preferred. Our datacentre is in Slough and attendance in the centre will be required (likely monthly). Remote and flexible working may be available depending on location and operational requirements.

Why join Tetra Tech?

Tetra Tech is a leading provider of consulting and engineering services working across the full project lifecycle worldwide. We have a wide range of expertise across our teams, providing a global support network with a personalised approach to client relationships to better understand where we can add value. We provide a collaborative environment that supports individual performance, innovation, and creativity.

We support public and private sector clients on local, national, and international projects to deliver sustainable and resilient solutions. Our operations in the UK, Ireland, and the Netherlands include more than 6,000 employees who are Leading with Science to solve our clients' most complex problems.

In alignment with the Equality Act 2010, we will make reasonable adjustments to support candidates and employees requiring additional arrangements. This could include adaptations to work schedules, training approaches, or the physical workspace. Please inform us if you need any accommodations during the recruitment process or in your day-to-day role.