Senior IT Infrastructure Administrator, Networking

Style Analytics; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Generous Time Off

Global Career Development

Social Events

Referral Bonus

Job summary

Confluence is seeking a Senior IT Infrastructure Administrator – Networking to join our enterprise infrastructure team. Based in London or Dublin, you’ll lead design, deployment and steady‑state operations for complex networking across global sites, with hybrid working options and light travel.

You’ll act as SME, mentor engineers and collaborate with security and IT teams to deliver resilient networks. In this role you’ll own incidents, drive optimization, support cloud migration and SD‑WAN

Qualifications

• Strong hands-on experience with Cisco enterprise networking technologies including Firepower, ISE and SD‑WAN solutions (Viptela/Catalyst).
• Deep understanding of enterprise network infrastructure: routers, switches, firewalls, VPNs and load balancers.
• Minimum of 8 years' experience within enterprise IT infrastructure or networking environments.
• Strong expertise with routing protocols including BGP, OSPF and EIGRP across multi-site environments.
• Proven ability to design, implement and transition infrastructure solutions into production.
• Hands-on experience in incident management, root cause analysis and issue resolution.
• Strong troubleshooting mindset to resolve complex networking issues independently.
• Understanding of how networking impacts wider infrastructure, security, virtualisation and database environments.
• Experience acting as a senior technical escalation point and mentoring other engineers.

Responsibilities

• Delivering and supporting enterprise infrastructure projects from design through implementation and into operational support.
• Acting as a networking SME across troubleshooting, optimisation and knowledge sharing.
• Supporting strategic initiatives including cloud migration and SD‑WAN implementation.
• Serving as a senior technical escalation point for complex networking issues.
• Driving improvements in network performance, resilience and operational efficiency.
• Maintaining infrastructure health through firmware updates, patching and configuration management.
• Supporting knowledge transfer and mentoring less experienced team members.
• Collaborating with infrastructure, security and technology teams to ensure successful project delivery.

Skills

Cisco enterprise networking

Firepower, ISE, SD-WAN

Routing protocols (BGP, OSPF, EIGRP)

Network design and deployment

Incident management

Troubleshooting complex networks

Mentoring engineers

Tools

VMware

NetApp

PowerShell

Python

Terraform

Ansible

Job description

Location: Dublin or London

Working pattern: Flexible approach required for occasional out-of-hours maintenance, project work and critical incidents. Very occasional travel, expected to be 10–25% maximum.

Why Confluence?

At Confluence, we’ve always been driven by a commitment to innovation, precision, and partnership in the investment data space. Our global footprint now spans multiple countries, giving our employees the opportunity to get exposure to other countries and cultures. And it stands to reason that none of this would have been possible without the hundreds of hard‑working employees who work at Confluence.

About The Role

We’re looking for a Senior IT Infrastructure Administrator – Networking to join Confluence in a hands‑on, senior networking role supporting enterprise infrastructure initiatives from design through implementation and into steady‑state operations.

This role is ideal for someone who enjoys combining project delivery with operational ownership — designing robust solutions, embedding them into support, and acting as a trusted technical escalation point for complex networking issues.

You’ll play a key role in our network transformation programme, supporting cloud migration initiatives and SD‑WAN deployment across a global environment.

Why apply?

This is more than a traditional network support role. You’ll have end‑to‑end involvement across design, implementation, optimisation and troubleshooting, with the opportunity to influence technical decisions and shape the future of our infrastructure landscape.

You’ll act as a Subject Matter Expert across networking technologies, helping to build internal capability, mentor colleagues and reduce reliance on third‑party vendors.

What you'll be doing

• Delivering and supporting enterprise infrastructure projects from design through implementation and into operational support.
• Acting as a networking SME across troubleshooting, optimisation and knowledge sharing.
• Supporting strategic initiatives including cloud migration and SD‑WAN implementation.
• Serving as a senior technical escalation point for complex networking issues.
• Driving improvements in network performance, resilience and operational efficiency.
• Maintaining infrastructure health through firmware updates, patching and configuration management.
• Supporting knowledge transfer and mentoring less experienced team members.
• Collaborating with infrastructure, security and technology teams to ensure successful project delivery.

Essential Requirements

• Strong hands‑on experience with Cisco enterprise networking technologies, including Firepower, ISE and SD‑WAN solutions (Viptela/Catalyst).
• Deep understanding of enterprise network infrastructure, including routers, switches, firewalls, VPNs and load balancers.
• Minimum of 8 years' experience within enterprise IT infrastructure or networking environments.
• Strong expertise with routing protocols including BGP, OSPF and EIGRP across multi‑site environments.
• Proven ability to design, implement and transition infrastructure solutions into production.
• Hands‑on experience in incident management, root cause analysis and issue resolution.
• Strong troubleshooting mindset with the ability to resolve complex networking issues independently.
• Understanding of how networking impacts wider infrastructure, security, virtualisation and database environments.
• Experience acting as a senior technical escalation point and mentoring other engineers.

Desirable requirements

• Experience within SaaS or cloud‑based environments.
• Exposure to virtualisation technologies such as VMware.
• Experience with enterprise storage platforms, including NetApp.
• Scripting or automation experience using PowerShell, Python, Terraform or Ansible.
• Cisco certifications such as CCNP or CCIE.
• Experience supporting cloud migration or infrastructure modernisation programmes.
• Previous SD‑WAN implementation experience.

Benefits

• Generous Time Off packages including additional half days with each public holiday in your location.
• Global Career Development opportunities
• Social Events
• Referral Bonus scheme - Upto $3,000 per successful referral

Plus many more!

More about the Location

We offer flexible working options for all employees.

This role can be based in either Dublin or London.

The successful candidate will be comfortable supporting occasional out‑of‑hours maintenance, project work and critical incidents when required. Some infrastructure changes may need to be completed outside standard business hours, including occasional evenings or weekends.

Travel requirements are expected to be low, with occasional travel when business needs require it.

Values

We look for people who align with our 4 values.

Integrity

Face reality with honesty, courage and accountability

Imagination

Deal creatively with challenges and envision what the world could be

Discipline

Build good habits into reflexes which become a part of our life

Service

Committed to the success of others

Pre‑Employment Screening Disclaimer

As part of our recruitment process, we carry out identity checks on all candidates. Offers of employment are conditional upon the completion of satisfactory background checks prior to the commencement of work. These checks may include verification of identity, right to work in the UK, employment history, and other relevant pre‑employment screening.

Please note that additional checks may be required depending on the nature of the role and the jurisdiction in which the role is based or operates. These may include, but are not limited to, criminal record checks or financial background checks where applicable.

As a leading global technology solutions provider to the investment management industry, Confluence helps clients solve complex investment data challenges across the front, middle and back office. Headquartered in Pittsburgh, PA, Confluence services over 1000 clients in 40 countries, with locations across Europe, North America, South Africa, Australia and Asia.