Senior-level automation/ Control systems engineer (HVAC)

Job Title: Senior Engineer Motors, Controls & PLC Software (HVAC) Location: Bethlehem, PA Onsite/ Hybrid/ Remote: Onsite/Hybrid at Bethlehem (There is a flexibility of Remote and sometime need to be in Bethlehem. Some Travel between Bethlehem & Texas may also be needed) Role Summary:- The Senior Engineer Motors, Controls & PLC Software (HVAC) is responsible for the design, development, programming, testing, and commissioning of motor control systems and PLC-based control software for HVAC equipment and systems. This role plays a key part in delivering reliable, energy efficient, and compliant HVAC control solutions across commercial and industrial applications. Key Responsibilities Control Systems & PLC Software Design, develop, and maintain PLC software for HVAC systems including chillers, AHUs, FCUs, pumps, and compressors Develop control logic for temperature, pressure, flow, humidity, and energy optimization Program and troubleshoot PLCs (e.g., Siemens, Rockwell/Allen Bradley, Schneider, or equivalent) Implement communication protocols such as Modbus, BACnet, LonWorks, Profibus, Profinet, and Ethernet/IP Support integration with BMS/EMS Motors & Drives Design and validate motor control strategies for AC/DC motors, EC motors, VFDs, and soft starters Select and specify motors, drives, and protection devices based on application requirements Optimize motor performance for energy efficiency, reliability, and compliance with HVAC standards Troubleshoot motor and drive-related field issues Controls & Hardware Design control panel architectures, I/O mapping, wiring schematics, and control hardware layouts Review and approve electrical drawings, BOMs, and technical documentation Ensure compliance with applicable standards (IEC, UL, IS, NEC, CE, etc.) Testing & Commissioning Perform software testing, FAT, SAT, and on-site commissioning Diagnose and resolve system-level issues during testing and field deployment Support root cause analysis and corrective actions Collaboration & Leadership Work closely with mechanical, electrical, firmware, and system engineering teams Provide technical guidance and mentoring to junior engineers Interface with customers, suppliers, and cross-functional stakeholders Required Qualifications Bachelor s or master s degree in electrical engineering, Electronics, Mechatronics, or related field 7 12 years of experience in HVAC controls, motor systems, or industrial automation Strong hands-on experience with PLC programming and debugging Solid understanding of motor control theory, VFDs, and HVAC system operation Experience with HVAC control strategies and energy optimization Technical Skills PLC Programming: Ladder Logic, Function Block, Structured Text Motors & Drives: Induction motors, BLDC/EC motors, VFD tuning HVAC Controls: PID tuning, sequencing, alarms, safety interlocks Communication: BACnet, Modbus RTU/TCP, LonWorks, CAN, Ethernet Tools: PLC IDEs, HMI/SCADA tools, simulation and testing tools Preferred Qualifications Experience with embedded control systems or hybrid PLC embedded architectures Exposure to global HVAC standards and certification processes Experience with cybersecurity concepts for industrial control systems Prior experience in product development lifecycle for HVAC equipment Soft Skills Strong analytical and problem-solving skills Ability to work independently and in cross-functional teams Clear communication and technical documentation skills Customer-focused mindset with attention to quality and reliability