Network Engineer

Test Triangle Ltd · Sheffield, England · 2 days ago

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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

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