Network Engineer

Test Triangle • Python • 2 days ago
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Salary
≈ $44k – $103k per year (Estimated)
Location
In office (Sheffield)
Employment
Contractor

Confirmed on the employer's own hiring board on Oct 11, 2026. First seen by Alion on Oct 10, 2026.

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Test Triangle

Test Triangle is a Dublin-headquartered technology services company providing IT service management consulting as an Atlassian, ServiceNow and Freshworks partner, along with software testing, cloud, digital transformation and recruitment outsourcing services. Operating since 2012 from Blanchardstown Corporate Park, it serves organisations across Ireland, the UK and further afield and supplies contract and permanent specialists to client organisations such as UK banks. Its postings are mainly client placements for data analysts, DevOps and platform engineers, cyber security specialists, solution architects, project managers and mobile developers in Dublin, London and other cities.
testtriangle.com • HQ: Dublin, Ireland • IT Service & Asset Management • Information Technology • Professional Services • 1001-5000 employees • Est. 2012
  • Location - Sheffield 3 days/week
  • 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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