PLC/SCADA Software Engineer

Heidi Chef Solutions LLC; Philippines; On-site; PHP 670,000 - 1,339,000; Full time

Job summary

Heidi Chef Solutions LLC in Quezon City, Philippines, is seeking an engineer to develop, modify, test, and maintain industrial automation software using Siemens technologies. This role focuses on software development and remote engineering support with TIA Portal V21, S7 PLCs, and WinCC/HMI platforms; electrical design and site work are not required.

You will develop PLC applications, configure WinCC HMI/SCADA, review design specs, and perform testing and debugging.

Qualifications

• Bachelor's degree in Electrical, Electronics, Mechatronics, Computer or Instrumentation Engineering is required.
• Minimum 3 years' experience developing Siemens PLC and SCADA software.
• Experience with STEP 7 Professional and Siemens S7-1200/1500 PLCs is mandatory.
• Experience with WinCC Professional and WinCC Unified is required.
• Strong ladder logic, FBD, SCL programming skills and protocol knowledge (Profinet, Modbus TCP, OPC UA).
• Experience supporting FAT and remote commissioning, reading electrical drawings, schematics and I/O schedules.
• Excellent written and verbal English communication skills.

Responsibilities

• Develop PLC software using Siemens TIA Portal and WinCC for PLC and HMI/SCADA systems.
• Configure and maintain Siemens S7-1200/1500 PLCs and supporting software.
• Review FDS, SOO, and I/O schedules before development.
• Perform offline testing using PLCSIM and support FAT remotely.
• Collaborate with project managers, controls engineers and commissioning teams.
• Read electrical schematics, control panel drawings, wiring diagrams and P&IDs.

Skills

Electrical schematics interpretation

Remote FAT support

English communication

Education

Bachelor's Degree in Electrical, Electronics, Mechatronics, Computer or Instrumentation Engineering

Tools

STEP 7 Professional

S7-1200

S7-1500

WinCC Professional

WinCC Unified

Ladder Logic

FBD

SCL

Profinet

Modbus TCP

OPC UA

SINAMICS StartDrive

Job description

Quezon City CPO, Philippines | Posted on 14/08/2026

The position isresponsible for developing, modifying, testing, and maintaining industrialautomation software using Siemens technologies. The role is primarily focused on software development and remote engineering support using Siemens TIA PortalV21, Siemens S7 PLCs and WinCC SCADA/HMI platforms. This position does notinclude electrical design, panel design or site installation responsibilities.

Work Overview

• Develop PLC application software using Siemens TIA PortalV21.
  
• Develop and maintain Siemens S7-1200 and S7-1500 PLCprograms.
  
• Develop, configure and modify WinCC HMI/SCADA applications.
  
• Review Functional Design Specifications (FDS), Sequence ofOperations (SOO), Cause & Effect matrices and I/O schedules beforedevelopment.
  
• Develop modular, reusable and well-documented PLC software.
  
• Perform offline software testing using PLCSIM whereapplicable.
  
• Support Factory Acceptance Testing (FAT) remotely.
  
• Provide remote software support during commissioning andtroubleshooting.
  
• Maintain software version control, backups and revisionhistory.
  
• Prepare software documentation, testing records and changelogs.
  
• Collaborate with project managers, controls engineers andcommissioning teams.
  
• Ability to read and interpret electrical schematics, controlpanel 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.
  
• Workingknowledge of electrical fault-finding, circuit theory, and industrialtroubleshooting techniques to support PLC software development, testing andcommissioning.
  

Requirements

Qualifications and Education Requirement

• Bachelor's Degree inElectrical, Electronics, Mechatronics, Computer or Instrumentation Engineering,or equivalent.
  
• Minimum 3 years' experiencedeveloping Siemens PLC and SCADA software.
  
• Technical Skills (Mandatory)
  
• 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
  
• BACnet/IP
  
• OPC UA
  
• SINAMICS StartDrive
  
• Building Management Systems(BMS)
  
• Experience supporting FAT andremote commissioning.
  
• Experience interpretingelectrical drawings and troubleshooting industrial control systems incollaboration with electrical and commissioning engineers.
  
• Strong written and verbalEnglish communication skills.