Career Area:
Manufacturing
Job Description:
Your Work Shapes the World at Caterpillar Inc.
When you join Caterpillar, you're joining a global team who cares not just about the work we do – but also about each other. We are the makers, problem solvers, and future world builders who are creating stronger, more sustainable communities. We don't just talk about progress and innovation here – we make it happen, with our customers, where we work and live. Together, we are building a better world, so we can all enjoy living in it.
Role Definition
We are seeking a PLC Engineer to deliver effective Operation and maintenance practices of paint shop, assembly shop and robotic control systems for production equipment’s to troubleshooting of Siemens, ABB & Mitsubishi controls, preventive & predictive maintenance to achieve production targets and quality standards with minimal downtime, perform projects, maintenance and collaboration with stake holders in a manufacturing plant.
Job Description – PLC Engineer – Siemens | ABB | Mitsubishi – Paint Shop, assembly Shop & Robo Plant)
Department: Maintenance
Permanent Location: [CAT BCP - Thiruvallur]
Reporting To: Maintenance Manager
Experience
7+ years (Industrial Automation / PLC Service)
Key Responsibilities
PLC Programming & Troubleshooting
• Troubleshoot and modify PLC programs for:
• Siemens (S7-300/400, S7-1200/1500, TIA Portal)
• ABB (AC500 series)
• Mitsubishi (FX / Q / iQ series)
• Online debugging, fault diagnosis, and logic optimization
• Handling PLC CPU, I/O modules, communication faults
Service & Commissioning
• Equipment’s breakdown support and root cause analysis
• PLC panel commissioning and startup support
• Machine retrofits, upgrades, and program backups/restoration
• Support preventive and corrective maintenance activities
HMI & Communication
• HMI troubleshooting and minor development (WinCC, GOT, ABB HMI)
• Industrial communication protocols:
• Profibus / Profinet
• Ethernet/IP
• Modbus (RTU/TCP)
• Integration with VFDs, servos, sensors, and safety devices
Documentation & Coordination
• Prepare service reports, logic change records, and backups
• Coordinate with production, maintenance, and OEM teams
• Provide technical guidance to technicians/operators
Required Skills & Qualifications
Technical Skills
• Strong hands-on experience in:
• Siemens PLC (Mandatory)
• ABB PLC
• Mitsubishi PLC
• Electrical panel understanding (schematics, wiring)
• VFDs (Siemens, ABB, Mitsubishi preferred)
• Basic SCADA knowledge (WinCC / ABB SCADA – added advantage)
Qualification
• Diploma / BE / BTech in Electrical / Electronics / Instrumentation / Automation
Soft Skills
• Strong troubleshooting mindset
• Ability to work independently during breakdowns
• Good communication and documentation skills
• Willingness to travel for field service support
Preferred / Added Advantage
• Automotive / Manufacturing industry exposure
• Safety PLC knowledge
• Servo drives commissioning
Relocation is available for this position.
Posting Dates:
December 24, 2025 - January 1, 2026
Caterpillar is an Equal Opportunity Employer. Qualified applicants of any age are encouraged to apply
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