OT Field Engineer

Jobtailor; Milton Keynes; On-site; GBP 40,000 - 60,000; Full time

Job summary

Jobtailor seeks an experienced OT Maintenance Engineer to support the maintenance, repair and commissioning of OT hardware and systems. The role emphasizes PLC and HMI programming, troubleshooting, and compliance with regulatory standards.

You will perform firmware upgrades and preventive maintenance, delivering technical support for integrated hardware and software across dispersed sites. A strong background in Rockwell/Schneider platforms is preferred.

Qualifications

• Education or time-served experience in maintenance, commissioning or field service with City and Guilds/NVQ Level 3 electrical qualification.
• Experience or training in PLC fault-finding or process control programming is advantageous.
• Knowledge of OT/ICS and SCADA with Rockwell/Schneider platforms.

Responsibilities

• Maintain, repair and commission OT hardware and systems with focus on PLC/HMI programming and troubleshooting.
• Perform firmware upgrades and preventive maintenance on integrated systems.
• Provide technical support for hardware and software components across distributed sites.

Skills

PLC Programming & Fault Finding

Telemetry Maintenance

Industrial Control Systems

SCADA Systems Familiarity

OT Cybersecurity

IP Networking Principles

Firmware Upgrades

Preventive Maintenance

Technical Troubleshooting

Education

HNC/HND in Electrical Engineering

City and Guilds/NVQ Level 3 Electrical Qualification

ONC/HNC Electrical/Electronic/Control Engineering

Tools

Rockwell Platforms

Schneider Electric Platforms

Ethernet

Fieldbus

RS232/485

UPS

LV Electrical Systems

Job description

Requirements

• Ideally be educated to HNC/HND (or equivalent) level or have time served experience in maintenance, commissioning or field service of electrical, instrumentation or telecommunications systems with a City and Guilds /NVQ level 3 electrical qualification.


• Experience of, and or formal training in programming and fault finding of Programmable Logic Controller (PLC) or process control equipment would be an advantage.


• Ideally educated to at least ONC/HNC level in Electrical, Electronic, or Control Engineering (or equivalent experience).


• Practical experience with the maintenance and repair of telemetry outstation hardware and software.


• Proven ability to methodically troubleshoot and resolve complex technical problems across integrated hardware and software systems.


• Demonstrated understanding and knowledge of PLC and HMI hardware and software, with specific experience in vendor platforms such as Rockwell and/or Schneider Electric.


• Familiarity with site-level SCADA systems, ideally including Rockwell platforms.


• Understanding and knowledge of industrial control networks and protocols (e.g., Ethernet, Fieldbus, RS232/485).


• Understanding of IP networking principles (Ethernet/LAN/WAN) and IP addressing fundamentals.


• Knowledge of communication technologies relevant to dispersed sites (e.g., radio, mobile, ADSL).


• Familiarity with industrial (OT) cybersecurity principles and controls.


• Good working knowledge of DC/AC supplies, Uninterruptible Power Supply (UPS) systems, and Low Voltage (LV) electrical distribution installations.

Core Competencies

Demonstrates expertise in the maintenance, repair, and commissioning of Operational Technology (OT) hardware and systems, with a strong focus on PLC and HMI programming, troubleshooting, and compliance with regulatory standards. Proficient in performing firmware upgrades, preventive maintenance, and providing technical support for integrated hardware and software systems.

Highest-signal resume keywords

• PLC Programming and Fault Finding


• Telemetry Hardware Maintenance


• Industrial Control Systems (ICS)


• SCADA Systems Familiarity


• OT Cybersecurity Principles

ATS Optimization Keywords

Hard Skills

• Operational Technology (OT) Maintenance


• Programmable Logic Controller (PLC)


• HMI Software and Hardware


• Telemetry Outstation Repair


• Industrial Control Networks


• IP Networking Principles


• Firmware Upgrades


• Preventive Maintenance


• Process Automation Modifications


• Technical Troubleshooting

Soft Skills

• Problem Solving


• Methodical Approach


• Technical Support

Certifications & Qualifications

• HNC/HND in Electrical Engineering


• City and Guilds/NVQ Level 3 Electrical Qualification

Industry Keywords

• Operational Technology (OT)


• Water and Water Recycling


• Industrial Control Systems (ICS)


• SCADA Systems


• Cybersecurity Principles

Tools & Technologies

• Rockwell Platforms


• Schneider Electric Platforms


• Ethernet


• Fieldbus


• RS232/485


• Uninterruptible Power Supply (UPS)


• Low Voltage (LV) Electrical Systems