Field Device Technician

Teraco – A Digital Realty Company; Gauteng; On-site; ZAR 400,000 - 600,000; Full time

Job summary

A leading company in Information Technology is seeking a Field Device Technician to oversee the operation and security of OT devices. The successful candidate will be involved in managing cybersecurity measures and lifecycle management of devices to ensure compliance with industry standards. This permanent role offers a dynamic work environment where collaboration with cross-functional teams is encouraged. A strong understanding of secure networking principles and effective communication skills are essential for success in this position.

Qualifications

• At least 3 years of experience in OT device management.
• Experience with threat detection tools and managing communication protocols.
• Knowledge of cybersecurity and networking certifications is preferred.

Responsibilities

• Manage the lifecycle and security of OT field devices.
• Monitor and act on alerts from OT cybersecurity platforms.
• Maintain an accurate asset database with vulnerability metadata.

Skills

OT device management

Cybersecurity best practices

Communication

Problem-solving

Project management

Education

Matric / Grade 12

3-year IT-related degree

Tools

Microsoft Defender for IoT

Claroty

Dragos

Schneider EBO

PME

Job description

Teraco Data Environments

2025/06/27 Gauteng

Job Reference Number: FDTJB5

Department: Infrastructure Management

Business Unit

Industry: Information Technology

Job Type: Permanent

Positions Available: 1

Salary: Market Related

PURPOSE OF THE ROLE The Field Device Technician is responsible for the secure operation and lifecycle management of all OT (Operational Technology) devices, with a strong focus on cybersecurity risk mitigation, threat intelligence integration, and compliance with industry standards.

Job Description

PURPOSE OF THE ROLE

The Field Device Technician is responsible for the secure operation and lifecycle management of all OT (Operational Technology) devices, with a strong focus on cybersecurity risk mitigation, threat intelligence integration, and compliance with industry standards. The role includes managing OT cyber hygiene, vulnerability patching, secure protocol configuration, and staying informed on current threat advisories and mitigations as issued by CISA (Cybersecurity and Infrastructure Security Agency). Technologies involved include Schneider EBO, PME, internally developed tools, and security platforms like Microsoft Defender for IoT, Claroty, and Dragos.

OBJECTIVES

Main Functions Of The Job

• Manage the lifecycle of OT field devices (e.g. HVAC, power meters, fire detection, telemetry equipment), planning for and managing of end-of-life replacement projects.
• Manage the security of OT field devices (e.g. HVAC, power meters, fire detection, telemetry equipment), ensuring devices are hardened and securely configured.
• Monitor and action alerts from OT cybersecurity platforms and maintain integrations with external threat feeds including CISA vulnerability and advisory notifications:
  
  

Subscribe to and track CISA ICS Advisories, Known Exploited Vulnerabilities (KEV) Catalog, and Alerts (AA).

Translate relevant CISA guidance into action plans for patching, network segmentation, or threat mitigation.

Collaborate with security teams to assess organizational exposure to newly published threats.

• Maintain an accurate, regularly updated OT asset database with vulnerability metadata and firmware status mapped to threat advisories.
• Ensure secure communication protocols (BACnet/IP Secure, Modbus/TCP with authentication, MQTT with TLS, secure NTP) are correctly implemented and monitored.
• Validate firmware updates and patches against current CISA and OEM advisories before deployment; develop rollback plans as needed.
• Align OT operations with global cybersecurity standards (IEC 62443, ISO27001, NIST CSF) and maintain robust change control and documentation.
• Create, maintain, and share incident response documentation for OT-specific vulnerabilities, referencing external advisories like CISA's.
  
  

Job Requirements

Skills Requirement

• At least 3 years of experience in OT device management, including managing firmware updates, patching vulnerabilities, and managing communication protocols such as BACnet, Modbus, MQTT, and NTP.
• Strong understanding of security best practices for OT devices, including ISO27001.
• Experience with threat detection and management tools such as "Microsoft Defender for IoT", "Claroty", and "Dragos".
• Knowledge of industry-recognized training in OT device management.
• Ability to work collaboratively with cross-functional teams, including BMS engineers, IT security teams, and vendors.
• Excellent communication and problem-solving skills.
• Strong project management skills and the ability to manage multiple projects simultaneously.
• Experience in configuring devices on industry-recognized software such as Schneider EBO and PME, as well as on internally developed software and web applications.
• Knowledge of encryption standards such as TLS/SSL.
• Implement corrective actions promptly to mitigate the negative effects of system changes.
• Packet inspection, CVE analysis, asset management
• Understanding of CISA alert classifications, vulnerability severity scoring (e.g., CVSS), and mitigation practices.
• Ability to coordinate with internal cybersecurity teams and external vendors to assess and implement technical controls.
  
  

Qualifications And Experience

• Matric / Grade 12 (essential)
• 3-year IT-related degree (preferred)
• Cybersecurity / Networking certification(s) preferred:
• CompTIA Security+, GICSP, CCNA/CCNP Security
• Certified OT Security Practitioner (ISA/IEC 62443)
• Threat intelligence or ICS-CERT awareness training
• Familiarity with CISA’s cybersecurity advisories, threat bulletins, and mitigation techniques.
• Strong understanding of secure networking principles and OT network zoning.