Tetra Tech
City, London
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 center 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. Recruitment Agencies We have a Preferred Supplier List of trusted partners to assist us when required and do not acknowledge any speculative CVs or unsolicited candidate introductions from agencies not on this list and any submitted will be taken as a gift. Please refer to the careers page on our website if you require any further information.
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 center 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. Recruitment Agencies We have a Preferred Supplier List of trusted partners to assist us when required and do not acknowledge any speculative CVs or unsolicited candidate introductions from agencies not on this list and any submitted will be taken as a gift. Please refer to the careers page on our website if you require any further information.
Tetra Tech
Senior Developer Build cloud solutions that make a real impact Purpose and Scope of the Role Tetra Tech is seeking an experienced Senior Developer to join our Client Digital Solutions team. You will help design, build, test and support market-leading cloud-based software for UK and NL services, as well as wider international clients. Working within a collaborative development team, you will deliver secure, high-quality applications across the full software lifecycle, using Microsoft Azure, C#/.NET, Angular and modern delivery pipelines. You will work closely with developers, testers and technical leads to translate backlog items into reliable code, maintain live solutions, resolve issues, and produce clear technical and end-user documentation. Your Impact in This Position In the short term, you will strengthen delivery on active projects and contribute to stable, well-tested releases. In the medium term, you will shape new external software solutions and influence development standards, architecture and quality. Over time, you will broaden your technical scope, develop your mentoring capability and build a pathway into greater technical leadership within significant digital delivery programmes. Core Capabilities Cloud Application Delivery Proven ability to develop, deploy, test and support Azure-based SaaS solutions to agreed architecture and quality standards. Front-End and API Development Strong Angular, C# and .NET skills, with experience delivering robust UI and API solutions using sound design patterns and best practice. Quality and Reliability Confident in unit testing, CI/CD, code quality checks and secure development practices, with attention to non-functional requirements. Collaboration and Delivery Effective at working with developers, testers and technical leads, managing priorities, meeting deadlines and supporting backlog refinement and estimation. Line Management Experience in line management and ability to mentor more junior members of the Developer team. Skills, Qualifications and Experience Essential: commercial software development experience; Azure cloud solution delivery; Angular; C#/.NET; API development; unit testing; Git. Plus, line management experience. Desirable: technical client-facing experience; SQL Server, Cosmos DB or similar; Azure DevOps; backlog definition and estimation; Bicep; GIS awareness; mentoring or line management. Work Patterns and Locations This is a remote role with agile working as standard. Office attendance will be occasional team meetings in at least once a month in the Abingdon office. 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.
Senior Developer Build cloud solutions that make a real impact Purpose and Scope of the Role Tetra Tech is seeking an experienced Senior Developer to join our Client Digital Solutions team. You will help design, build, test and support market-leading cloud-based software for UK and NL services, as well as wider international clients. Working within a collaborative development team, you will deliver secure, high-quality applications across the full software lifecycle, using Microsoft Azure, C#/.NET, Angular and modern delivery pipelines. You will work closely with developers, testers and technical leads to translate backlog items into reliable code, maintain live solutions, resolve issues, and produce clear technical and end-user documentation. Your Impact in This Position In the short term, you will strengthen delivery on active projects and contribute to stable, well-tested releases. In the medium term, you will shape new external software solutions and influence development standards, architecture and quality. Over time, you will broaden your technical scope, develop your mentoring capability and build a pathway into greater technical leadership within significant digital delivery programmes. Core Capabilities Cloud Application Delivery Proven ability to develop, deploy, test and support Azure-based SaaS solutions to agreed architecture and quality standards. Front-End and API Development Strong Angular, C# and .NET skills, with experience delivering robust UI and API solutions using sound design patterns and best practice. Quality and Reliability Confident in unit testing, CI/CD, code quality checks and secure development practices, with attention to non-functional requirements. Collaboration and Delivery Effective at working with developers, testers and technical leads, managing priorities, meeting deadlines and supporting backlog refinement and estimation. Line Management Experience in line management and ability to mentor more junior members of the Developer team. Skills, Qualifications and Experience Essential: commercial software development experience; Azure cloud solution delivery; Angular; C#/.NET; API development; unit testing; Git. Plus, line management experience. Desirable: technical client-facing experience; SQL Server, Cosmos DB or similar; Azure DevOps; backlog definition and estimation; Bicep; GIS awareness; mentoring or line management. Work Patterns and Locations This is a remote role with agile working as standard. Office attendance will be occasional team meetings in at least once a month in the Abingdon office. 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.
