Senior Rockwell PLC & HMI Software Architect (relocation in France)

Overview
Expleo is a global engineering, technology, and consulting service provider that partners with leading organizations to guide them through their business transformation, helping them achieve operational excellence and future-proof their businesses.
Expleo benefits from more than 50 years of experience developing complex products in automotive and aerospace, optimizing manufacturing processes, and ensuring the quality of information systems. Leveraging its deep sector knowledge and wide-ranging expertise in fields including AI engineering, digitalization, automation, cybersecurity and data science, the group's mission is to fast-track innovation through each step of the value chain.
With a worldwide presence in 30 countries, our global footprint includes excellence centers around the world, including Romania since 1994.
Responsibilities

• PLC program architecture: Check program structure, naming, modularity, reusability, maintainability and compliance with STLA-CS Rockwell principles.
• Function block review: Verify delivered function blocks such as PLC/robot communication, safety gate management, inverter control, diagnostics and standard operating functions.
• HMI design and coding: Check HMI faceplates, navigation, screen consistency, alarm behavior, settings, ergonomics and runtime performance.
• Test-bench validation: Prepare and execute validation tests on the test bench, identify deviations, document results and follow corrective actions.
• Checklists and test plans: Build, fill and maintain software verification checklists for PLC blocks, HMI faceplates, communication and diagnostics.
• Urgent project development: Develop urgent PLC/HMI functions required by Atessa when supplier delivery or project timing requires direct support.
• Industrial communication: Develop and validate OPC UA Server functions in the Rockwell environment for monitoring systems, and support MQTT/MQTTS exchanges required by the Atessa MES context.

Qualifications

• Very strong hands-on experience with Rockwell / Allen-Bradley PLC programming, including ControlLogix and GuardLogix environments.
• Strong experience in Rockwell HMI design and coding, including faceplate philosophy, navigation and diagnostics.
• Ability to review supplier-delivered PLC programs and challenge architecture, code quality and performance.
• Strong knowledge of EtherNet/IP, CIP Safety, PLC/robot interfaces, inverter control and industrial diagnostics.
• Ability to develop OPC UA Server functions in the Rockwell environment for monitoring systems.
• Ability to work on MQTT/MQTTS interfaces related to MES requirements defined by Stellantis Atessa project.
• Good understanding of Siemens automation standards and TIA Portal concepts to understand the current STLA-CS Siemens standards and ensure alignment.

Essential skills

• Work with the Poissy STLA-CS team as the main operational base.
• Collaborate with Rockwell teams and Rockwell subcontractors.
• Collaborate with project teams and integrators involved in Atessa and future STLA-CS Rockwell projects.
• Travel in the Paris area when needed for workshops, reviews or technical meetings.
• Limited travel to Sochaux to exchange with STLA-CS Siemens teams and understand existing control standards.
• Limited travel to Atessa, Italy, if required to understand the real project needs and support field alignment; expected travel remains limited, typically one or two trips until the end of 2026

What do I need before I apply
Relocation to Poissy, France