Network Engineer

Test Triangle Ltd; Sheffield; On-site; GBP 50,000 - 70,000; Full time

Job summary

Zohorecruit in Sheffield, United Kingdom, seeks an experienced network engineer with hands-on Cisco IOS-XE switching, VLANs, STP/RSTP, and QoS. The role focuses on designing, provisioning, and securing complex enterprise networks in mixed IT/OT environments.

You will work with SD-WAN, SDA fabric design, ISE for AAA and TrustSec, and automation using Terraform, Ansible, and GitLab CI. Strong scripting (Python/Bash) and current knowledge of industrial cyber security frameworks (IEC 62443, NIST SP

Qualifications

• Strong Cisco IOS-XE switching, VLANs and STP/RSTP experience.
• Hands-on SD-WAN and SDA fabric design, deployment and operations.
• Familiarity with OT/IT DMZ design and industrial cybersecurity.

Skills

IOS-XE Cisco

VLANs

STP/RSTP

QoS

SD-WAN

SD-Access SDA

ISE

NETCONF/RESTCONF

Python scripting

Bash scripting

Tools

Terraform

Ansible

GitLab CI

GitHub Actions

Jenkins

Job description

Sheffield, United Kingdom | Posted on 08/18/2026

• Strong expertise with Cisco Catalyst switching (IOS-XE), VLANs, STP, RSTP, port security, and Qos.
• Practical experience with Cisco SD-WAN / Catalyst SD-WAN) - policy templates, VPN segmentation, and WAN edge configuration.
• Hands-on experience with Cisco SD-Access (SDA) fabric design, commissioning, and operations.
• Working knowledge of Cisco Catalyst Centre - device management, assurance, and automation workflows.
• Understanding of OT network architecture, including the Perdue Model and IT/OT DMZ design.
• Familiarity with OT protocols: Modbus, DNP3, EtherNet/IP, PROFINET, IEC 61850, or OPC-UA.
• Experience writing Terraform configurations for infrastructure provisioning
• Exposure to CI/D tooling (GitLab CI, GitHub Actions, Jenkins, or equivalent).
• Scripting proficiency in Python and/or Bash for network automation tasks.
• Strong troubleshooting skills across Layers 2-7.
• Experience with Cisco ISE (Identity Services Engine) for AAA, profiling, and TrustSec.
• Knowledge of Ansible or Terraform for network configuration management.
• Familiarity with Cisco NSO or RESTCONF/NETCONF interfaces.
• Exposure to industrial cybersecurity frameworks: IEC 62443, NIST SP 800-82, or NIS2.
• Experience with SCADA/ICS systems (e.g., Ignition, Wonder ware, Siemens TIA Portal, Rockwell FactoryTalk).
• Familiarity with network monitoring tools