Infrastructure Solutions Designer

About this role

We are PXC, the UK’s largest provider of wholesale connectivity. Our vision is to be the UK’s #1 wholesale platform, a one-stop shop provider of connectivity, voice, cloud and security underpinned by the UK’s most robust, secure, resilient and reliable network.

Born from the combination of Virtual1 and TalkTalk’s wholesale services and national network business, we operate across our 3 core sites (Salford, London and Skopje, North Macedonia).

Our mission is clear, to be the UK’s best company to work for and best to work with. We believe this success is driven by the power of our employees. We empower our people to become true experts in their field who embody our values every day: we care; we challenge; we commit.

About The Team

The PXC IT Services department delivers secure, scalable and intelligent digital infrastructure, integrating private and public cloud capabilities that empower innovation, accelerate deliver and safeguard the future of PXC.

We are a team that delivers high quality services to the business; aligned to our values:

Secure by Design – Security is embedded into everything we do.

Operational Excellence – We take pride in doing things right the first time, and better every time.

Cloud-Thinking, Value-Focused – Our solutions are guided by business impact and user experience, maximising value, scalability and accelerating delivery.

*Collaboration Without Boundaries*– We enable a consistent collaboration experience for our People.

*One Team*– We are one team, supported by our strategic IT Partner, delivering a unified IT vision aligned with PXC’s business objectives.

*Critical National Infrastructure*– We provide essential services to support the UK’s Critical National Infrastructure, ensuring full compliance with UK legislation.

*Resilience*– Delivering highly available, cyber resilient solutions.

As an Infrastructure Solution Designer, you will be part of a team of designers responsible for shaping and governing the technical design of PXC’s infrastructure services across Private Cloud, Public Cloud (Azure), and Identity & Access Management. You will produce high-quality low-level technical designs, driving key technology decisions and establishing the architectural guardrails that ensure our infrastructure platforms are secure, scalable, resilient, and aligned to business objectives.

Working closely with Architecture, Security, Engineering, Delivery, and third-party partners, you will design end-to-end infrastructure solutions that span on-premises and cloud environments. You will ensure that all designs adhere to industry standards, regulatory requirements, and PXC IT and Security standards, enabling the business to deliver robust and innovative services to its customers.

Key Responsibilities

Your key responsibilities will be

Architecture, Design & Engineering

• Produce, review, and maintain high-level and low-level technical designs across infrastructure domains including Private Cloud, Public Cloud (Azure), Identity & Access Management (IAM), connectivity, and end-user services.
• Design secure, scalable, resilient, and supportable infrastructure solutions that meet business, operational, security, and regulatory requirements.
• Develop detailed low-level designs for infrastructure platforms, including compute, storage, virtualisation, networking, identity services, and cloud-native services.
• Define and promote reusable design patterns, standards, and technology guardrails to improve consistency, security, operational efficiency, and cost optimisation.
• Ensure all solutions incorporate security, identity, connectivity, resilience, and operational support considerations from inception.
• Evaluate existing infrastructure and cloud services, identifying opportunities to improve performance, security, scalability, reliability, and cost efficiency.

Subject Matter Expertise & Governance

• Act as a technical design authority across infrastructure technologies, including Private Cloud, Azure, and Identity Services.
• Develop and maintain infrastructure architecture blueprints, standards, reference designs, and best practice guidance.
• Assess technical risks, dependencies, and constraints, defining appropriate mitigation strategies and design recommendations.
• Provide technical leadership and design assurance throughout project and delivery lifecycles.
• Ensure infrastructure designs align with PXC technology strategies, security policies, regulatory requirements, and architectural standards.

Collaboration & Stakeholder Engagement

• Work closely with Enterprise, Security, and Solution Architects to ensure infrastructure designs support wider business and technology objectives.
• Collaborate with engineering, operations, delivery teams, business analysts, project managers, and third-party suppliers to translate business requirements into effective technical solutions.
• Facilitate technical workshops and design reviews to drive consensus and ensure alignment across stakeholders.
• Provide technical guidance, mentoring, and knowledge sharing to engineering and operational teams, supporting the adoption of new technologies and design approaches.
• Act as a trusted advisor to stakeholders, helping shape infrastructure strategy and technology investment decisions.

Engineering Practices

• Ensure solutions are designed for operational excellence, with appropriate monitoring, observability, backup, recovery, and support models.
• Support successful delivery and transition of infrastructure solutions into operational service.
• Drive continual improvement through lessons learned, technical innovation, automation, and adoption of emerging technologies.
• Contribute to the ongoing evolution of PXC's infrastructure capabilities across private cloud, public cloud, and identity services.

What Will Make You Successful in This Role?

• Strong experience designing and delivering enterprise infrastructure solutions across private cloud, public cloud, identity services, networking, compute, storage, and end-user technologies.
• Strong experience producing high-quality high-level and low-level technical designs for complex infrastructure environments and transformation programmes.
• Deep understanding of cloud and infrastructure architectures, including hybrid cloud, virtualisation, platform services, resiliency, disaster recovery, and operational support models.

Nice to Have

• Experience working within regulated or security-conscious environments.
• Knowledge of enterprise architecture frameworks, ITIL, Agile, DevSecOps, or related governance methodologies.
• Relevant industry certifications such as Microsoft Azure, TOGAF, ITIL, CISSP, or equivalent.
• Experience designing and implementing Identity and Access Management (IAM) solutions, including Microsoft Entra ID, Single Sign-On (SSO), Multi-Factor Authentication (MFA), federation, privileged access, and identity governance.
• Strong knowledge of Microsoft technologies and services, including Azure, Entra ID/Active Directory, and related infrastructure and security capabilities.
• Experience designing and transforming infrastructure services across on-premises, private cloud, and public cloud environments.
• Understanding of infrastructure licensing, vendor management, support models, and cost optimisation principles.
• Strong analytical and problem-solving skills, with the ability to evaluate complex technical requirements and develop effective design solutions.
• Ability to balance business, operational, security, and commercial requirements when making technical design decisions.
• Demonstrated adaptability across a broad range of infrastructure technologies, platforms, and toolsets, with a commitment to continuous learning.
• Strong stakeholder management skills with the ability to influence technical and non-technical audiences at all levels of the organisation.

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