Senior Network Engineer

CIS Oncology
Full-time Belfast, Northern Ireland IT & Technology
Posted:
February 25, 2026
Location:
Belfast, Northern Ireland, United-Kingdom

Job Description

Join System C and help connect and transform health and care through secure, resilient networks that millions rely on every day. You’ll design, implement and operate modern network services across our data centres and Azure, acting as the subject‑matter expert for Fortinet firewalls, F5 BIG‑IP and Cisco routing/switching. You’ll lead complex change, solve major incidents, and raise the bar on reliability and security.

What You’ll Do

  • Own end‑to‑end network change across routing/switching, firewalls, VPN and load balancing
  • Engineer Azure networking (vNet/vWAN, VNets, UDRs, private endpoints, ExpressRoute)
  • Harden configurations and drive segmentation and security policy compliance
  • Troubleshoot performance and availability (L2‑L7) using captures, logs and metrics
  • Create clear documentation, runbooks and diagrams; mentor engineers and associates
  • Participate in a 24/7 on‑call rota and drive problem management imp...

Apply for this Job

Submit your application for the Senior Network Engineer position at CIS Oncology.

Apply Now Save for Later

Job Overview

Job Type: Full-time
Location: Belfast, United-Kingdom
Posted: February 25, 2026
Deadline: April 06, 2026