Senior Enterprise Infrastructure & Cloud Engineer

Addition Solutions Ltd; Sunderland; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Flexible working arrangements

Onsite Sunderland 1 day per week

Job summary

Addition Solutions Ltd in Sunderland is seeking an experienced Enterprise Systems & Infrastructure Engineer. This senior, hands-on role covers enterprise networking, cloud infrastructure, identity management, Microsoft 365 and security-focused SaaS environments.

You’ll design, implement and manage resilient systems to keep infrastructure secure, scalable and highly available while supporting end-user experience across the wider business.

Qualifications

• 5+ years’ experience in Infrastructure Engineering, or equivalent senior 3rd Line Support experience.
• Strong knowledge of enterprise networking technologies.
• Deep experience with Active Directory.
• Strong knowledge of VMware and/or Hyper‑V.
• Experience managing SAN and enterprise storage solutions.
• Strong knowledge of AWS, including EC2, S3 and hybrid infrastructure.
• Experience supporting cloud and on‑premise environments.
• Strong firewall administration experience, ideally with FortiGate.
• Experience with VPNs, BGP and network security.
• Advanced Microsoft 365 and Intune experience.
• Strong knowledge of endpoint management and security tooling.
• Hands‑on experience using PowerShell for scripting and automation.

Responsibilities

• Leading the architecture and deployment of enterprise networks, cloud infrastructure and on‑premise solutions.
• Managing office and data‑centre network infrastructure, including switches, firewalls, LAN/WAN and wireless technologies.
• Supporting and administering AWS environments, including core services such as EC2 and S3.
• Managing identity and access‑management platforms including Okta, ensuring secure authentication and effective access controls.
• Supporting collaboration and endpoint‑management platforms including Microsoft 365, Intune and Security & Compliance.
• Providing escalation support for complex infrastructure issues and helping maintain high levels of system availability.
• Managing enterprise networking technologies including VPNs, routing and BGP.
• Administering firewalls, including FortiGate environments.
• Supporting Active Directory and virtualisation technologies including VMware and Hyper‑V.
• Managing SAN and enterprise storage solutions.
• Driving process improvements through automation, monitoring and performance optimisation.
• Using PowerShell to automate infrastructure and operational tasks.
• Supporting disaster recovery, backup strategies and infrastructure lifecycle management.
• Mentoring junior engineers and providing technical guidance across the wider team.
• Collaborating with internal teams to deliver complex enterprise infrastructure initiatives.
• Ensuring infrastructure solutions are designed with security, stability and performance in mind.

Skills

Enterprise networking

Cloud infrastructure

Identity management

Microsoft 365

Security SaaS

Tools

Okta

VMware

Hyper-V

FortiGate

Job description

Addition Solutions Ltd in Sunderland is seeking an experienced Enterprise Systems & Infrastructure Engineer. This senior, hands-on role covers enterprise networking, cloud infrastructure, identity management, Microsoft 365 and security-focused SaaS environments.

You’ll design, implement and manage resilient systems to keep infrastructure secure, scalable and highly available while supporting end-user experience across the wider business.