Senior Network Engineer

Randstad Digital; Sheffield; Hybrid; GBP 50,000 - 70,000; Full time

Job summary

Randstad Digital is looking for a high-caliber Network Engineer in Sheffield to join our IT Infrastructure and Operations team on a critical 6-month project. You'll be pivotal in bridging traditional networking and Azure cloud infrastructure. Responsibilities include designing secure LAN/WAN infrastructure, leading Azure network designs, and managing enterprise firewalls. Candidates must have a CCNP certification and a proven track record in hybrid environments. This role offers strategic oversight on high-availability systems within a regulated banking environment.

Qualifications

• Must hold a CCNP or equivalent industry certification.
• Proven track record in managing secure, scalable network architectures across hybrid environments.

Responsibilities

• Design and maintain secure LAN/WAN infrastructure.
• Lead the design of Azure virtual networks, subnets, and NSGs.
• Manage enterprise-grade firewalls to protect workloads.
• Provide 3rd line support and direct root cause analysis.

Skills

Cisco Expertise

Hybrid Experience

Education

Cisco Certified Network Professional (CCNP)

Tools

Terraform

Job description

Location: London or Sheffield (Hybrid: ~2 days per week on-site)

Level: Professional (Band P3)

Are you a CCNP-level engineer with a passion for hybrid cloud environments? We are looking for a high-caliber Network Engineer to join our IT Infrastructure and Operations team for a critical 6-month project.

This role sits at the heart of our Platforms team, where you’ll bridge the gap between traditional on-premises networking and cutting‑edge Azure cloud infrastructure.

The Mission

You will be responsible for the reliability, security, and performance of our network across both on‑premises and Azure environments. Your day‑to‑day will involve:

• Cisco Networking: Designing and maintaining secure LAN/WAN infrastructure (switches, routers, and structured cabling).
• Cloud Integration: Leading the design of Azure virtual networks, subnets, NSGs, and ExpressRoute.
• Security First: Managing enterprise‑grade firewalls (On‑prem and Azure WAF) to protect business‑critical workloads.
• Technical Leadership: Providing 3rd line support, directing root cause analysis, and governing complex network changes.

Who You Are

• Cisco Expertise: Must hold a Cisco Certified Network Professional (CCNP) or equivalent industry certification.
• Hybrid Experience: Proven track record in managing secure, scalable network architectures across hybrid environments (SFIA Level 5).

Highly Desirable

• Infrastructure as Code (IaC) skills (Terraform).
• Experience in Financial Institutions or UK Government sectors.
• Familiarity with Zero Trust architecture and modern segmentation.

Why Apply?

This is a chance to provide strategic oversight on high‑availability systems within a regulated banking environment. You'll work with a talented IT Operations team and managed service providers to deliver reliable, efficient, and secure IT services.

Are you ready to optimize our enterprise network?