Senior Engineer

Senior Engineer (HVAC)

Location: Bethlehem, PA (Onsite) Duration: Contract Rate: $53/hr. C2C, $45/hr w2

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 Client/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

Diverse Lynx LLC is an Equal Employment Opportunity employer. All qualified applicants will receive due consideration for employment without any discrimination. All applicants will be evaluated solely on the basis of their ability, competence and their proven capability to perform the functions outlined in the corresponding role. We promote and support a diverse workforce across all levels in the company.