Senior Electrical Design Engineer; onsite

About Johnson Controls

Johnson Controls, a global leader in thermal management, mission-critical building systems, energy efficiency, and decarbonization, helps customers use energy more productively, reduce carbon emissions, and operate with the precision and resilience required in rapidly expanding industries such as data centers, healthcare, pharmaceuticals, advanced manufacturing, and higher education.

Johnson Controls, a global leader in thermal management, mission-critical building systems, energy efficiency, and decarbonization, helps customers use energy more productively, reduce carbon emissions, and operate with the precision and resilience required in rapidly expanding industries such as data centers, healthcare, pharmaceuticals, advanced manufacturing, and higher education.

For more than 140 years, Johnson Controls has delivered performance where it really matters. Backed by advanced technology, lifecycle services and an industry‑leading field organization, we elevate customer performance, turn goals into real‑world results and help move society forward.

Visit  for more information and follow @Johnson controls on social platforms.

Johnson Controls is hiring! The Senior Electrical Design Engineer is responsible for electrical analysis, detailed design, controls integration, and overall electrical performance of HVAC equipment, including air handlers, fan coils, and blower coils. This role supports new product development, sustaining engineering, prototyping, laboratory validation, and manufacturing execution across air handling, fan coil, and VAV platforms.

In this position, you will work closely with cross‑functional teams—including mechanical, controls, test laboratory, compliance, sourcing, manufacturing, service, applications, and marketing—to deliver market‑leading, safe, compliant, serviceable, and cost‑effective HVAC products. You will provide technical leadership on complex electrical systems and serve as a subject‑matter expert for assigned products, subsystems, or technologies. This position is based onsite in Largo, FL. Candidates must be commuting distance to the facility, or able to relocate.

We offer various relocation packages.

• Define system‑level electrical architectures, perform load analyses, and coordinate protective devices for HVAC equipment platforms.
• Design and review electrical schematics, wiring diagrams, and harnesses, and develop panel, enclosure, and junction layouts that support manufacturability, serviceability, and thermal performance.
• Integrate motors, variable‑frequency drives (VFDs), electronically commutated (EC) motors, controllers, sensors, actuators, and control interfaces across both line‑and low‑voltage systems.
• Develop and maintain electrical engineering standards, parts libraries, specifications, and design rules supporting configurable products and dynamic bill of material (BOM) generation.
• Interpret and apply applicable electrical safety and compliance requirements, including NEC, UL 1995, and UL 60335‑2‑40, ensuring designs meet agency requirements for wiring methods, protection, accessibility, and markings.
• Create and maintain agency listing documentation, support certification testing, and work with internal compliance teams and third‑party agencies to resolve non‑conformances and implement corrective actions.
• Support A2L refrigerant programs, including refrigerant detection system integration, alarm and control responses, and sensor location coordination.
• Partner with the test laboratory to define and execute electrical test plans validating motors, drives, heaters, controllers, and safety devices.
• Analyze test results, identify root causes, and drive corrective actions
• Collaborate…