Test Triangle

Network Engineer

Posted Yesterday

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Shelfield, Stratford-on-Avon, Warwickshire, England, GBR

In-Office

Mid level

Information Technology • Software • Consulting

The Role

Designs, commissions, operates, and troubleshoots Cisco enterprise, SD-WAN, and SD-Access networks. Responsibilities include switching, VLANs, routing, network segmentation, Cisco ISE, OT network architecture, SCADA/ICS connectivity, and industrial cybersecurity. The role also develops infrastructure automation using Terraform, Ansible, Python, and Bash, integrates CI/CD tooling, and uses network APIs and monitoring platforms to manage and assure network environments.

Summary Generated by Built In

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

Skills Required

Strong expertise with Cisco Catalyst switching using IOS-XE, including VLANs, STP, RSTP, port security, and QoS
Practical experience with Cisco SD-WAN, including policy templates, VPN segmentation, and WAN edge configuration
Hands-on experience with Cisco SD-Access fabric design, commissioning, and operations
Working knowledge of Cisco Catalyst Centre for device management, assurance, and automation workflows
Understanding of OT network architecture, including the Purdue Model and IT/OT DMZ design
Familiarity with OT protocols including Modbus, DNP3, EtherNet/IP, PROFINET, IEC 61850, or OPC-UA
Experience writing Terraform configurations for infrastructure provisioning
Exposure to CI/CD tooling such as GitLab CI, GitHub Actions, Jenkins, or equivalent
Scripting proficiency in Python and/or Bash for network automation
Strong troubleshooting skills across OSI Layers 2 through 7
Experience with Cisco ISE 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 including IEC 62443, NIST SP 800-82, or NIS2
Experience with SCADA/ICS systems such as Ignition, Wonderware, Siemens TIA Portal, or Rockwell FactoryTalk
Familiarity with network monitoring tools

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The Company

104 Employees

Year Founded: 2012

What We Do

Test Triangle is a Dublin-headquartered technology services company founded in 2012. It helps organizations transform operations through IT service management, digital transformation, software testing and quality assurance, cloud solutions, consulting, managed services, and recruitment. The company also provides application testing, DevOps, robotic process automation, software and mobile development, technology training, staffing, and resource augmentation across Ireland, the UK, and international markets.