Senior IT Infrastructure Administrator, Networking

Confluence Technologies, Inc.; Greater London; On-site; GBP 70,000 - 100,000; Full time

Benefits offered by this job

Generous Time Off

Global Career Development

Social Events

Referral Bonus scheme – Up to $3,000

Flexible working options

Job summary

Confluence Technologies, Inc. is seeking a Senior IT Infrastructure Administrator, Networking in London to own enterprise networking end-to-end.

You will design, implement and operate complex solutions, collaborating with stakeholders to deliver scalable, secure infrastructure and continuous improvement across the network estate. The role requires senior expertise with Cisco technologies, SD-WAN, routing protocols, and scripting, offering exposure to multi-site environments and global projects

Qualifications

• 8+ years in enterprise IT infrastructure or networking roles.
• Hands-on Cisco technologies: Firepower, ISE, SD-WAN (Viptela/Catalyst).
• Deep knowledge of routing and switching, VPNs and load balancing.
• Routing protocols across multi-site environments: BGP/OSPF/EIGRP.
• Experience designing, implementing, and transitioning to production.

Responsibilities

• Own the full network lifecycle from design through to operations.
• Serve as SME with visibility and influence on infrastructure decisions.
• Hands-on work with Cisco tech and SD-WAN transformation.
• Drive internal capability and reduce vendor reliance.
• Collaborate on cross-functional initiatives across multi-site infra.

Skills

8+ years networking

Cisco Firepower

Cisco ISE

SD-WAN (Viptela)

Routing protocols (BGP/OSPF/EIGRP)

Deployment & production transition

Troubleshooting & RCA

VMware

NetApp storage

Scripting (PowerShell/Python)

Cisco certifications (CCNP/CCIE)

Job description

Senior IT Infrastructure Administrator, Networking

Department: IT - Information Technology

Employment Type: Permanent - Full Time

Location: London, United Kingdom

Reporting To: Radek Hruby

Description

Location- UK ( London)

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.

More about the role & team

This is a senior, hands‑on networking opportunity where you’ll own enterprise infrastructure end‑to‑end — from initial design through implementation and into steady‑state operations. Working closely with infrastructure and business stakeholders, you’ll deliver complex network solutions while ensuring they are scalable, secure, and fully embedded into ongoing support. This role exists to strengthen internal expertise and reduce reliance on external vendors, placing you at the center of critical infrastructure transformation initiatives.

You’ll operate as a true Subject Matter Expert and technical escalation point, leading troubleshooting, optimizing performance, and driving continuous improvement across the network estate. Beyond delivery, you’ll play a key role in enabling the wider team through knowledge transfer, documentation, and best practices. This role suits a senior network engineer who enjoys both building and owning solutions, and who thrives in environments where they can influence standards, drive change, and work across large‑scale, multi‑site infrastructure.

• Own the full network lifecycle — from design through to operations, not just delivery
• Step into a true SME role with visibility and influence across infrastructure decisions
• Work hands‑on with modern Cisco technologies, including SD‑WAN transformation
• Drive real impact by building internal capability and reducing vendor reliance
• Gain exposure to enterprise‑scale, multi‑site environments and cross‑functional initiatives

Based in a major tech hub (e.g., Toronto, US, or Ireland), this is an attractive opportunity for candidates looking to work on modern Cisco technologies and SD‑WAN transformation within an enterprise‑scale environment. You’ll gain exposure to cross‑functional initiatives, cloud‑integrated infrastructure, and projects with real business impact—ideal for those ready to step into a visible, high‑impact engineering role with long‑term growth.

What skills and experience do I need to succeed?

• 8+ years’ experience in enterprise IT infrastructure or networking roles
• Strong hands‑on experience with Cisco technologies (Firepower, ISE, SD‑WAN – Viptela/Catalyst)
• Deep knowledge of network infrastructure (routing, switching, firewalls, VPNs, load balancing)
• Expertise in routing protocols (BGP, OSPF, EIGRP) across multi‑site environments
• Proven experience designing, implementing, and transitioning solutions into production
• Strong troubleshooting skills, including root cause analysis and incident resolution
• Experience maintaining infrastructure health (patching, upgrades, configurations)
• Experience in SaaS or cloud‑based environments
• Exposure to virtualized infrastructure (e.g., VMware)
• Familiarity with enterprise storage platforms (e.g., NetApp)
• Experience with scripting or automation (PowerShell, Python, Terraform, Ansible)
• Cisco certifications (CCNP or CCIE)

What do we offer?

• Generous Time Off packages including additional half days with each public holiday in your location.
• Global Career Development opportunities.
• Social Events.
• Referral Bonus scheme – Up to $3,000 per successful referral.
• Plus many more!

We offer flexible working options for all employees.

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.