PLC Engineering Team Lead

LiquidStack; Carrollton (TX); Hybrid; USD 120,000 - 180,000; Full time

Job summary

LiquidStack is hiring a Senior PLC Controls Engineer to lead the design, development, and delivery of PLC controls for CDU and skidded platforms. You will develop, test, and maintain PLC programs across major platforms (Allen-Bradley or Siemens) and design user interfaces for operator screens.

You will integrate with customer BMS and assist with field commissioning. You will own controls software architecture, set coding standards, and collaborate with our Hong Kong team on shared libraries.

Qualifications

• Bachelor’s degree required in Electrical or related field.
• 10+ years of industrial PLC programming experience.
• Expert with at least one major platform (Allen-Bradley Studio 5000, Siemens TIA Portal, or similar).
• Strong HMI design experience (FactoryTalk, WinCC, Ignition, or equivalent).
• Deep familiarity with BACnet, Modbus, and data center BMS integration patterns.

Responsibilities

• Develop, test, and maintain PLC programs for CDU and skidded platforms.
• Design HMI screens and operator interfaces.
• Integrate with customer Building Management Systems (BMS) and data center management platforms.
• Support factory acceptance testing, site acceptance testing, and field commissioning.
• Maintain version control, change history, and release notes for controls software.
• Collaborate with the Hong Kong controls team on shared code libraries and standards.
• Own controls software architecture across the CDU portfolio.
• Establish coding standards, library structures, and review practices.
• Lead customer-facing controls discussions and BMS integration design.
• Mentor the PLC Engineer.

Skills

PLC programming

HMI design

BMS integration

Mentoring/leadership

Education

Bachelor’s degree in Electrical Engineering, Controls Engineering, Computer Engineering, or related

Tools

Allen-Bradley Studio 5000

Siemens TIA Portal

FactoryTalk

WinCC

Ignition

Job description

About LiquidStack & the Team
LiquidStack is the established leader in liquid cooling for data center, HPC, and AI workloads, with manufacturing, R&D, and headquarters in Carrollton, Texas and a longstanding engineering presence in Hong Kong. As part of Trane Technologies, we are scaling our US-based engineering capability to augment our Hong Kong team. The new Texas engineering team will focus on the design, development, and delivery of large Coolant Distribution Units (CDUs) and skidded direct-to-chip platforms including our GigaModular™ CDU family for hyperscale, colocation, and AI infrastructure customers. The team will own manufacturability, ETL / CSA / CE / NRTL compliance, and customer-facing engineering for these product families, working in close collaboration with the Hong Kong team on shared architecture and component engineering. The PLC team owns the controls software and HMI for skidded CDUs including resilient management control for the GigaModular™ family covering PLC programming, BMS integration, and customer-visible control behavior.

Role Overview

Senior individual contributor and technical authority on PLC controls.

Key Responsibilities

• Develop, test, and maintain PLC programs (Allen-Bradley, Siemens, or equivalent) for CDU and skidded platforms.
• Design HMI screens and operator interfaces.
• Integrate with customer Building Management Systems (BMS) and data center management platforms.
• Support factory acceptance testing, site acceptance testing, and field commissioning.
• Maintain version control, change history, and release notes for controls software.
• Collaborate with the Hong Kong controls team on shared code libraries and standards.

Additional Responsibilities

• Own controls software architecture across the CDU portfolio.
• Establish coding standards, library structures, and review practices.
• Lead customer-facing controls discussions and BMS integration design.
• Mentor the PLC Engineer.

Required Qualifications

• Bachelor’s degree in Electrical Engineering, Controls Engineering, Computer Engineering, or related.
• 10+ years of industrial PLC programming experience.
• Expert with at least one major platform (Allen-Bradley Studio 5000, Siemens TIA Portal, or similar).
• Strong HMI design experience (FactoryTalk, WinCC, Ignition, or equivalent).
• Deep familiarity with BACnet, Modbus, and data center BMS integration patterns.