PLC/SCADA Software Engineer

Purpose

Work Overview

• Develop PLC application software using Siemens TIA Portal V21.
  
• Develop and maintain Siemens S7-1200 and S7-1500 PLC programs.
  
• Develop, configure and modify WinCC HMI/SCADA applications.
  
• Review Functional Design Specifications (FDS), Sequence of Operations (SOO), Cause & Effect matrices and I/O schedules before development.
  
• Develop modular, reusable and well-documented PLC software.
  
• Perform offline software testing using PLCSIM where applicable.
  
• Support Factory Acceptance Testing (FAT) remotely.
  
• Provide remote software support during commissioning and troubleshooting.
  
• Maintain software version control, backups and revision history.
  
• Prepare software documentation, testing records and change logs.
  
• Collaborate with project managers, controls engineers and commissioning teams.
  
• Ability to read and interpret electrical schematics, control panel drawings, wiring diagrams, P&IDs and I/O schedules.
  
• Sound understanding of industrial electrical control systems, including AC/DC circuits, relays, contactors, motor starters (DOL/reversing), analogue/digital I/O, protection devices, residual current protection (RCD/RCCB), and fail-safe control principles.
  
• Working knowledge of electrical fault-finding, circuit theory, and industrial troubleshooting techniques to support PLC software development, testing and commissioning.
  

Requirements

Qualifications and Education Requirement

• Bachelor's Degree in Electrical, Electronics, Mechatronics, Computer or Instrumentation Engineering, or equivalent.
  
• Minimum 3 years' experience developing Siemens PLC and SCADA software.
  
• Technical Skills (Mandatory)
  

• Siemens TIA Portal V21
  
• STEP 7 Professional
  
• Siemens S7-1200 and S7-1500 PLCs
  
• WinCC Professional and/or WinCC Unified
  
• Ladder Logic (LAD)
  
• Function Block Diagram (FBD)
  
• Structured Control Language (SCL)
  
• Profinet
  
• Modbus TCP
  
• PLC diagnostics and troubleshooting
  

• Preferable
  

• BACnet/IP
  
• OPC UA
  
• Siemens ET200 Remote I/O
  
• SINAMICS StartDrive
  
• Building Management Systems (BMS)
  
• HVAC automation experience
  

• Experience supporting FAT and remote commissioning.
  
• Experience interpreting electrical drawings and troubleshooting industrial control systems in collaboration with electrical and commissioning engineers.
  
• Strong written and verbal English communication skills.