7 Infrastructure Architecture jobs in the United Kingdom

Enterprise Architect – Infrastructure Architecture (Contract)

Hybrid (2–3 days onsite, UK-based)

Full-time | Contract | Inside IR35

Initial Term: 6 months (with potential extension)

Are you an experienced infrastructure strategist ready to shape the future of digital platforms across a large-scale, multi-domain organisation? We’re looking for a senior Enterprise Architect – Infrastructure Architecture to lead the development of infrastructure strategy, patterns, and roadmaps in a complex public sector environment.

This is a hybrid contract role , ideal for someone who thrives at the intersection of infrastructure, cloud, and enterprise-scale transformation, and who can confidently engage with senior stakeholders to influence long-term direction.

Key Responsibilities

• Define and maintain the infrastructure architecture vision and roadmap.
• Lead architectural engagements across infrastructure and operational domains.
• Inspire and manage a team of architects, including contractors and permanent staff.
• Collaborate with senior stakeholders to shape strategic direction and investment.
• Identify opportunities for innovation and emerging technology adoption.
• Support investment case development and whole-life costing.
• Ensure infrastructure solutions align with enterprise principles and deliver measurable value.
• Provide architectural assurance and contribute to procurement and supplier evaluation.
• Mentor and upskill other architects, promoting best practices across the team.

What You’ll Bring

• Extensive experience in enterprise or infrastructure architecture at a senior level.
• Strong leadership and stakeholder engagement skills.
• Deep understanding of cloud, networking, hosting, and platform services.
• Experience guiding architecture at a domain level and setting strategic guardrails.
• Proven ability to mentor and develop architectural capability in others.
• Excellent communication skills, with the ability to engage both technical and non-technical audiences.
• Experience working in or with the Civil Service is highly desirable.
• A technical degree or equivalent experience.

Contract Details

• Location : Hybrid (2–3 days onsite per week, UK-based)
• IR35 Status : Inside IR35
• Duration : 6 months (initial), with potential for extension
• Start Date : ASAP

Why this role matters

This is a technical expert role in Research and Network Strategy where the individual will apply their key expertise within a clearly defined sphere of technical knowledge to complex business issues or opportunities. The role holder actively engages with colleagues to progress new research in important technical topics and supports the realisation of business value from research and innovation outputs.

This role is based in Ipswich or Bristol and our hybrid working model means you are expected to be in the office 3 days per week.

You'll have the following responsibilities

Technical expert responsible for maintaining expertise in a specific technical domain.

•    Responsible for intellectual property creation, contributing to patent filing with their team and supporting IPR exploitation where appropriate
•    Accountable for performing research in a specific domain (i.e. Cloud Infrastructure Research) or area that is typically unknown, complex, high impact and high value across multiple domains.
•    Responsible for authoring technical papers, capturing intellectual property.
•    Responsible for developing novel research work and contributing towards recommendations for future research projects.

You'll have the following skills and exprience

Skills

•    Technical domain expert: Technical or domain expertise. They continually develop their expertise in a key technical area so they are recognised as a technical expert in that domain
•    Qualifications: Strong academic record in technology specialism, qualified to degree level and may hold a post-graduate qualification
•    Expert communicator: Presents to peers and managers about their research and area of technical expertise.
•    Experienced in open innovation: Contributes to creation of patents, technical publications, conference presentations etc.
•    Concept Evaluation: ability to spot relevant innovations, horizon scanning, determine relevance for the business, develop an effective conceptualisation and build trials to test the concept.

Experience

Technical domain expert: evidence of significant knowledge and skill relevant to Cloud Infrastructure, including:

•    Networks fundamentals (MANDATORY) 
•    NFV/Virtualisation core principles (MANDATORY) 
•    Infrastructure/hardware aspects of telco cloud (MANDATORY) 
•    Able to file new IPR naturally as it emerges in the candidate's research (MANDATORY)
•    Linux- admin, OS, networking (DESIRABLE) 
•    Software-defined networking and its role in telco cloud deployments (DESIRABLE)
•    Automation principles applicable to telco cloud and cloud native infrastructure (DESIRABLE) 
•    Other (non CPU) hardware in telco cloud infrastructure  (DESIRABLE) 
•    Data centre design fundamentals (DESIRABLE) 
•    Tooling/instrumentation (DESIRABLE) 
•    Software development (DESIRABLE) 
•    AI/ML and applicability to network management and optimisation (DESIRABLE)
•    Experience of publishing papers and delivering conference presentations (DESIRABLE) 
•    Significant delivery: evidence of business impact through contribution to delivery of research (MANDATORY)
•    Stakeholder management: evidence of managing project tasks within local team. (MANDATORY)
•    Innovative Thinker: ability to spot and identify new innovations and act to bring them in and capitalise and create value (MANDATORY)
•    Commercial Applicability: understanding the business opportunity and potential value around relevant innovations (PREFERRED)
•    Problem solving, intellectually curious, comfortable taking ownership and responsibility
•    Self-starter, proactively working with minimal guidance

Benefits

•    10% on target bonus
•    BT Pension scheme, minimum 5% Employee contribution, BT contribution 10%
•    From January 2025, equal family leave:  receive 18 weeks at full pay, 8 weeks at half pay and 26 weeks at the statutory rate. It’s for all parents, no matter how your family is made up.
•    Enhanced women’s health support: including help with menopause symptoms, cancer screenings, period care and more.
•    25 days annual leave (not including

Infrastructure Architect

Basingstoke. Occasional travel may be required. No remote working possible.

Our purpose is to make the world more sustainable by building trust in society through innovation. As an Infrastructure Architect you will contribute to this by utilising energy efficient hardware and designing solutions that reduce energy use such as the use of virtualisation and efficient data management techniques and by implementing green software engineering principles.

You will be responsible for the creation of design artefacts that enable the provision of Microsoft Windows Server solutions, both physical and virtual, using industry standard tooling and methodologies which vary in size and complexity. You will work closely with Solution Owners and Project Managers to ensure that solutions are defect free, in-line with approved designs and meet the customer requirements.

Your transferable skills and experience:

• Experience in producing high quality solutions and documentation using a structured approach for components with varying degrees of complexity.
• Demonstrable experience in the creation, or modification, of a variety of design artefacts (Architecture Overview Documents, High-Level Designs and Low-Level Designs) for Microsoft Windows Server solutions, both physical and virtual.
• Experience of steering solutions through several quality gates.
• The ability to produce, support and maintain work packages throughout the Customer Solution Lifecycle.
• Experience in requirements management and associated tooling.
• Experience of working on secure infrastructure solutions Including demonstrable experience of the design and implementation of security policies following the appropriate guidelines, experience in Secure by Design (SbD) advantageous.
• Experience creating and executing PowerShell scripts and Infrastructure as Code (IaC).
• Demonstrable experience of the migration from ESXi to Hyper-V is advantageous.
• Experience of Terraform and/or Ansible and advanced knowledge of Microsoft Windows Server, Active Directory, Group Policy including Certification Authority role service within an enterprise environment along with experience in designing and deploying HyperV, SCCM, and MECM solutions.

Please note: It’s still worth applying even if you do not meet all the requirements above. We are passionate about investing in you and your career and if you have the transferable skills/ background as an Infrastructure/Integration Engineer or 4th Line Support Professional this could be the next opportunity for you.

Recruitment process

The recruitment process consists of a one stage interview and will comprise a mixture of technical competency questions, scenario-based questions and behavioural competency-based questions.

We are a Disability Confident Employer and will offer an interview to disabled applicants who meet the minimum/essential criteria for the role. Email if you would like to apply through the Disability Confident Interview Scheme.

Achieve together

We are recognised as a responsible and inclusive employer: Not only are we a certified Disability Confident Leader, a Times Top 50 employer for Gender Equality, a Top 75 employer for Social Mobility, accredited with the Living Wage Foundation and a signatory for the Race at Work Charter, but we are also committed to the United Nations standards for LGBTI+ and a Stonewall Top 100 Employer.

We are people centric: Our work environments enable you to Be Completely You. Our active people-led Inclusive Community networks are representative of all aspects of diversity and are instrumental in enabling and supporting our innovative approach to inclusion.

Infrastructure Architect (Any Specialist Architect Considered) - Must have an Active DV Clearance

About the Infrastructure Architect role
We are seeking experienced Infrastructure Architects to join an established practice and help deliver secure, enterprise-scale solutions. This is a hands-on role working closely with Network Architects and Project Managers, giving you the opportunity to design, test and implement complex systems in a challenging but rewarding environment.

What you will be doing as an Infrastructure Architect

• Taking full ownership of solutions from design through prototyping, testing and implementation

• Leading the delivery of technical change and enhancements to meet evolving customer requirements

• Troubleshooting and resolving issues across the full solution life cycle

• Providing 4th line support to live service teams, ensuring availability and resilience

• Coaching and mentoring support teams to enhance skills and capability

Skills needed for the Infrastructure Architect

• Extensive VMware expertise with strong knowledge of vSphere 6.7/7, ESX performance and fault resolution

• Experience with VMware Cloud Foundation (VCF), NSX and vSAN highly desirable

• Proven ability to produce High and Low Level Designs, BOMs and supporting documentation

• Strong background with storage technologies including Veeam, NetApp, iSCSI, FC and NFS

• Solid Microsoft stack knowledge, ideally Windows Server 2019 and MCSE

• Awareness of ISODE messaging products, SQL, Network Data Diodes and Splunk is beneficial

• If not VMware-focused, candidates with specialist architecture skills in IDAM, Active Directory, SQL, Microsoft, or Linux will also be considered

This is an exciting opportunity for an Infrastructure Architect to deliver mission-critical projects in a secure environment.

To apply, please send your CV by pressing the apply button.

Infrastructure Architect - VMware - Must hold an Active DV Clearance

About the Infrastructure Architect role
We are seeking experienced Infrastructure Architects to join an established practice and help deliver secure, enterprise-scale solutions. This is a hands-on role working closely with Network Architects and Project Managers, giving you the opportunity to design, test and implement complex systems in a challenging but rewarding environment.

What you will be doing as an Infrastructure Architect

• Taking full ownership of solutions from design through prototyping, testing and implementation

• Leading the delivery of technical change and enhancements to meet evolving customer requirements

• Troubleshooting and resolving issues across the full solution life cycle

• Providing 4th line support to live service teams, ensuring availability and resilience

• Coaching and mentoring support teams to enhance skills and capability

Skills needed for the Infrastructure Architect

• Extensive VMware expertise with strong knowledge of vSphere 6.7/7, ESX performance and fault resolution

• Experience with VMware Cloud Foundation (VCF), NSX and vSAN is essential

• Proven ability to produce High and Low Level Designs, BOMs and supporting documentation

• Strong background with storage technologies including Veeam, NetApp, iSCSI, FC and NFS

• Solid Microsoft stack knowledge, ideally Windows Server 2019 and MCSE

• Awareness of ISODE messaging products, SQL, Network Data Diodes and Splunk is beneficial

This is an exciting opportunity for an Infrastructure Architect to deliver mission-critical projects in a secure environment.

To apply, please send your CV by pressing the apply button.

Are you an AWS Cloud infrastructure professional with a solid background in both AWS Cloud and Server Infrastructure (Windows)? 

Are you interested in solidifying your skills in the above areas and joining a team who have recently migrated to AWS? 

Do you have the experience to assist StepChange in the transformation to AWS and all that comes with it? From tech, to process, to modernisation?  

We are undertaking multiple large technology transformation projects across our business to revolutionize the way we offer our services, moving from on-premises towards cloud-based solutions. 

This newly created position will be integral to enhancing our technical infrastructure and ensuring best-in-class security. 

You will work cross-functionally and collaborate with senior stakeholders across the business while working closely with Technology Services colleagues to implement procedural and technical aspects of Security Operations, including liaison and engagement with the MSSP/SOC. 

What will you be doing? 

In this role, you will play a key role in implementing, optimizing, and maintaining the cloud infrastructure (AWS), ensuring robust performance, high availability, and comprehensive support. 

You will also lead on the maintenance of the charity's legacy environments (Windows Server)

This role is ideal for someone driven by the ever-changing world of technology and has a passion for researching and understanding new technologies which may contribute to improved, and cost-effective service provision. 

We are looking for people with: 

• Legacy Environment Support (Essential):
• Providing operational support and maintenance for our Windows Server estate.

• Troubleshooting, patching, and managing upgrades to ensure system stability and security
• Supporting the transition of legacy workloads into modern cloud-native solutions where appropriate
  • Compute & Infrastructure (Essential):
• Deploying, configuring, and optimising workloads using EC2 and related services
• Building and managing resilient and highly available infrastructure across multiple AWS regions and availability zones
• Storage (Essential):
  • Implementing and supporting storage solutions within AWS.
  • Designing data lifecycle policies and ensuring efficient, cost-effective storage usage
• Networking & Content Delivery (Essential):
  • Configuring and maintaining VPCs, subnets, route tables, Transit Gateways, and VPNs
  • Leveraging CloudFront, Route 53, and API Gateway for secure and scalable content delivery
• Security & Identity (Essential):
  • Applying best practice security principles using IAM, KMS, Secrets Manager, and AWS Organisations
  • Working with the Cyber Security team to embed compliance, monitoring, and governance controls
• Automation & Orchestration (Essential):
  • Building Infrastructure as Code (IaC) using Terraform.
  • Designing CI/CD pipelines for repeatable, automated deployments
  • Driving operational excellence with monitoring, logging, and observability tools such as CloudWatch and AWS Config.
• Monitoring (Desirable) - Grafana
• Strong troubleshooting skills and diagnostic abilities for BAU escalations
• An aptitude for Security and a keen eye for detail.
• Ideally but not mandatory - Load Balancing, IP Telephony and contact centre services and containerisation

• AWS (Strong Experience):

• Experience/understanding of FCA rules and regulations along with ITIL experience is preferential but not essential. 
• You will have a proven track record in cloud infrastructure with a sound understanding of security (anti-virus, firewalls, access control, etc.)

Your Benefits 

If flexible working is important to you, then look no further! At StepChange, we are proud of our culture and our commitment to flexible working. This role is based in our Leeds city centre office (currently working 2 days a month in the office and the rest from home). 

You will also get an excellent benefits package including: 

• 27 days annual leave (this increases by one day per year up to a maximum of 5 additional days plus