Senior Infrastructure Engineer

Acorn Group; Liverpool; Hybrid; GBP 50,000 - 58,000; Full time

Benefits offered by this job

35 days holiday

Mental health support

Career development & learning

Flexible benefits

Hybrid working

Job summary

Acorn Group is seeking a Senior Infrastructure Engineer in Liverpool City Centre HQ to lead hands-on infrastructure delivery across on‑premises and Azure. You will drive technical excellence, manage backups, monitoring and recovery plans, and collaborate with cloud and SecOps teams to ensure resilient services.

The role requires strong Active Directory, Windows Server, Office 365 and Exchange in a hybrid environment, plus scripting with PowerShell or Ansible.

Qualifications

• Min 4 years infrastructure experience
• Excellent Active Directory skills
• Broad infra disciplines: Network, Windows Server, Storage, Virtualisation, Security
• Experience in team supervision or mentoring is a plus
• Office 365 security and tools knowledge; strong Exchange hybrid skills
• Scripting: PowerShell or Ansible
• Familiar with ITIL processes

Responsibilities

• Lead hands-on infrastructure delivery and knowledge transfer.
• Manage on-premises infrastructure with monitors, backups and recovery plans.
• Collaborate with cloud platform team for Azure-related aspects.
• Ensure tickets are handled efficiently within SLA.
• Promote best practices across the infra team.
• Work with Project, Development, Cloud Platform and SecOps teams.
• Contribute to disaster recovery planning and resilience.
• Evaluate infrastructure products and lead deployments.
• Design and document infrastructure solutions.
• Remediate vulnerabilities with SecOps.

Skills

Infrastructure experience

Active Directory

Office 365

Exchange (Hybrid)

PowerShell

Ansible

ITIL

Security basics

Tools

Azure

Windows Server

Storage

Networking

Virtualisation

Terraform IaC

Jira

Confluence

Job description

Here at Acorn we are looking for a passionate Senior Infrastructure Engineer to join us in a hands‑on multi‑disciplined technical support role within the IT infrastructure support and 3rd line escalation team. Within this team you will be supporting the Infrastructure Support Manager in driving delivery of robust, performant, resilient and recoverable infrastructure and systems, a mixture of on‑premises and Azure.

Role

Senior Infrastructure Engineer

Location

Location: Liverpool City Centre HQ

Salary

Salary: £50,000–£58,000 depending on experience

What you will be doing

• You will be in a hands‑on technical lead role within the infrastructure team, supporting the promotion of technical excellence and quality across the team and leading knowledge transfer.
• Use your expertise of classic infrastructure disciplines, technologies & best practices to drive the deployment and management of the on‑premises infrastructure, ensuring all infrastructure assets and interfaces have appropriate monitors, alerts, backups and recovery plans in place.
• Although this role does not directly manage the Azure platform, it is expected that this role will manage aspects with the platform, requiring knowledge and close collaboration with the cloud platform team.
• Use your experience to help the delivery of best‑of‑breed 3rd line support function, ensuring tickets and issues raised are managed efficiently and to expected quality, within SLA.
• Be continually aware of enhancements available within current deployed infrastructure solutions as well as any shifts in technology & enhancements benefitting the business.
• Work cross functionally with our Project, Development, Cloud Platform, and SecOps teams for new deployments, providing continual management and maintenance.
• Supporting the development of disaster recovery plans and maintaining operational resilience within the infrastructure remit.
• Lead technical evaluation of products within the infrastructure domain, participating in the deployment & implementation of the infrastructure technologies.
• Contribute to the technical design of best of breed infrastructure solutions, exploiting industry best practice.
• Work with the SecOps engineers to remediate any vulnerabilities identified within remit.

Critical Competencies

• Minimum 4 years’ Infrastructure experience, with minimum of 1yrs in a similar senior capacity or performing senior duties within a team of engineers with a support background.
• Excellent Active Directory and associated services skills.
• Experience with broad variety of classic infrastructure disciplines & technologies; Network, Windows Server, Storage, Virtualisation, Security and Mail and associated services and functions.
• Experience of team supervision, or mentoring would be an advantage.
• High level of knowledge with Office 365 suite of applications, security, and tools.
• Excellent Microsoft Exchange skills, ideally in Hybrid solution.
• Previous experience in designing and leading implementation of infrastructure solutions.
• Experience using infrastructure auto‑deployment and scripting techniques; PowerShell, Ansible.
• Experience of the development of design and documenting technical solutions.
• Proactive and logical approach to fault identification, troubleshooting and problem solving.
• Working knowledge of ITIL.

What we are looking for

• Network technologies; All LAN/WAN components, routing and protocols.
• Windows Server and storage architecture solutions.
• MS Exchange and messaging techniques and troubleshooting, ideally in hybrid setup.
• An understanding of cloud computing platforms, principals, and services.
• PowerShell or similar Scripting solutions.
• Zero‑trust solutions, VPN, SSO setup, PIM and MFA solutions.
• Perimeter and Endpoint Security solutions, SWEG, Web Access, Anti‑Malware config.
• Microsoft Windows Server OS, updating, upgrading, Linux experience an advantage.
• Backup & Recovery design and testing.
• Mitigating infrastructure and operating system security vulnerabilities.
• MS Office 365 platform support; SharePoint, OneDrive, Teams, Intune management.
• Working within a ticket management system with SLA and KPI adherence.

Certifications and Experience

• Linux Server configuration and support.
• MS SQL server and support.
• Deploying and supporting cloud infrastructure, any platform an advantage.
• Web application development techniques and tools, XML, .Net framework, and development lifecycle, to provide adequate support to the developer teams.
• Jira helpdesk and Confluence.
• Terraform IaC deployments.
• Remote Desktop RDS/AVD/VDI environments.
• Supporting and securing MacBook devices.
• IP Telephony design, implementation and/or support.

Benefits

• 35 days’ holiday (including bank holidays) with additional buy/sell options.
• 24/7 mental health support & free counselling available.
• Grow with us: Through career fairs, leadership programs, and learning on the go.
• Flexible benefits, including early access to salary via our internal platform.
• Hybrid working options to support work‑life balance and individual needs.
• Recognition awards, social events & more.

Company Commitments

• Mindful Employer – championing mental health and wellbeing.
• Disability Confident Level 1 & 2 – creating accessible, inclusive opportunities.
• Menopause Friendly accredited – supporting every stage of life.
• Armed Forces Covenant signatory – honouring those who serve.
• Great Places to Work 2024/25 – fostering an engaging and positive workplace culture.
• Best Place to Work for Development – proud to be investing in people’s future.
• Best Place to Work for Women – breaking down barriers to women’s career progression.

Application Process

All roles at Acorn are subject to DBS and financial checks. Any offer we make will be conditional until these are completed to a satisfactory standard.

Because our training is quite comprehensive, we can only consider applicants who have at least one year remaining on their Graduate or Post‑Study Work visa. At the moment, we’re not able to offer visa sponsorship.

We’re committed to creating an inclusive, supportive workplace where everyone can flourish. If you need any adjustments during the recruitment process—or once you’re part of the team—just let us know. Whether it’s flexible hours, adapted equipment, or a bit of extra support, we’ll work with you to make sure you can do your best work.