Thermal Systems Controls Engineer | PLC & Automation

Vertiv Corporation; Westerville (OH); On-site; USD 90,000 - 130,000; Full time

Job summary

Vertiv Corporation in Westerville, OH develops and supports software and control logic for system-level thermal controls and optimization solutions across CDU systems, secondary fluid networks, pumps, chillers and heat reuse applications. You will contribute to product development and customer projects, writing reusable modules, GUIs and project-specific control logic.

The role involves collaborating with Offering Management and Platform Engineering to standardize software and deploy scalable

Qualifications

• Bachelor's degree in Engineering, Automation, Computer Science, Electrical Engineering, Mechanical Engineering or equivalent technical experience.
• Experience in industrial automation, HVAC controls, liquid cooling controls, BMS, PLC programming or data center thermal controls.
• Strong programming capability with Codesys or similar PLC development environments.
• Knowledge of IEC 61131-3 programming languages, especially Structured Text.
• Working knowledge of Python for scripting, automation, data handling or software support Tools.
• Experience with HMI/GUI development, SCADA systems or industrial visualization platforms.
• Good understanding of control systems, sensors, actuators, control loops and plant-level automation.
• Knowledge of Modbus TCP, BACnet, MQTT or similar protocols.
• Ability to read and interpret control diagrams, sequence of operation documents, P&IDs, electrical schematics and I/O lists.
• Ability to work in a global, cross-functional environment.
• Good written and verbal communication skills in English.

Responsibilities

• Develop software and control logic for system-level thermal controls and optimization solutions.
• Support software for platforms such as Chilled Water Manager and Optimizer, Secondary Fluid Network Manager and future applications.
• Write, test and maintain PLC/control code using Codesys and IEC 61131-3 languages.
• Develop supporting tools, scripts, data processing routines and automation utilities in Python.
• Support GUI/HMI interfaces, dashboards, visualization pages and operator workflows.
• Implement control strategies for hydronic and liquid cooling systems across CDU, pumps, valves and chillers.
• Develop reusable software blocks and libraries for scalable deployment.
• Assist with customer-driven customization and site-specific operation sequences.
• Collaborate to translate roadmaps and feedback into software requirements.
• Identify synergies and reusable components with platform teams.
• Support integration with external equipment using Modbus TCP, BACnet, MQTT and others.
• Support factory testing, software validation, simulation and project preparation.
• Assist commissioning teams during remote troubleshooting and urgent modifications.
• Maintain software documentation, version control, and release notes.
• Capture field feedback to inform future releases and roadmaps.

Skills

Codesys PLC development

IEC 61131-3 languages

Python scripting

HMI/SCADA development

Industrial communication protocols

Modbus TCP

BACnet

MQTT

Reading diagrams and sequences

English communication

Education

Bachelors degree in Engineering/CS/EE/Mech or equivalent

Tools

Ignition

Unify SCADA

Git

Job description

Vertiv Corporation in Westerville, OH develops and supports software and control logic for system-level thermal controls and optimization solutions across CDU systems, secondary fluid networks, pumps, chillers and heat reuse applications. You will contribute to product development and customer projects, writing reusable modules, GUIs and project-specific control logic.

The role involves collaborating with Offering Management and Platform Engineering to standardize software and deploy scalable