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.  

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 johnsoncontrols.com for more information and follow @Johnsoncontrols on social platforms.  

What You Will Do

Johnson Controls is hiring! The Senior Mechanical Engineer is responsible for mechanical analysis, detailed design, subsystem integration, and overall mechanical performance of HVAC equipment. 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 electrical, 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 mechanical designs and serve as a subject-matter expert for assigned products or subsystems. Candidates must be commuting distance to Largo, FL, since this is an onsite position. For candidates that are able to relocate, we offer various relocation packages.

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How You Will Do It

• Perform mechanical analysis and design of HVAC units, components, and assemblies, including sheet-metal, insulation, fans, motors, heat exchangers and piping packages.

• Develop innovative mechanical solutions for custom and configured equipment based on customer requirements, performance targets, and regulatory constraints.

• Execute design improvements to optimize manufacturability, serviceability, performance, and product quality.

• Take ownership of assigned products or subsystems and provide technical leadership throughout the product lifecycle.

• Use SolidWorks, AutoCAD, and related tools to create and maintain 3D models, drawings, DXFs, and assemblies.

• Create and maintain accurate assembly bills of material (BOMs), including raw materials, fabricated parts, and purchased components.

• Develop and maintain engineering standards, design guides, submittal documents, and technical specifications.

• Support configurable product platforms by developing and maintaining design rules and logic used in dynamic BOM generation.

• Collaborate with manufacturing to support prototype and mock-up builds.

• Partner with the test laboratory to define and execute test plans validating performance and reliability

• Analyze test results, identify root causes, and drive corrective actions

• Support manufacturing engineering with DFMA improvements to ensure successful transition from design to production.

• Interpret and apply applicable mechanical safety and compliance requirements, including UL standards.

• Provide mechanical guidance to applications engineering, sales, service, and field teams regarding product capabilities, installation constraints, and troubleshooting.

• Lead and participate in continuous improvement initiatives to reduce design cycle time and increase engineering throughput.

• Mentor junior engineers and designers to ensure consistent application of engineering standards and best practices.

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What We Look For

Required

• Bachelor’s Degree or equivalent in Mechanical Engineering.

• 5+ years of mechanical engineering experience in a product-based manufacturing environment.

• Strong understanding of mechanical engineering theory, thermodynamics, heat transfer, and airflow fundamentals.

• Experience designing sheet-metal assemblies and mechanical HVAC components.

• Proficiency with 3D CAD tools (SolidWorks preferred) and creation of detailed drawings and specifications.

• Experience developing and maintaining mechanical BOMs.

Preferred

• Experience supporting prototype builds and laboratory testing.

• Familiarity with HVAC manufacturing processes, including sheet-metal fabrication, fastening methods, insulation installation, brazing, and welding.

• Knowledge of DFMA, cost optimization, and value engineering.

• Experience supporting configurable product platforms.

• Prior experience mentoring engineers or designers.

HIRING SALARY RANGE: $93,000 - $155,000 (Salary to be determined by the education, experience, knowledge, skills, and abilities of the applicant, internal equity, and alignment with market data.) This position includes a competitive benefits package. The posted salary range reflects the target compensation for this role. However, we recognize that exceptional candidates may bring unique skills and experiences that exceed the typical profile. If you believe your background warrants consideration beyond the stated range, we encourage you to apply. To support an efficient and fair hiring process, we may use technology assisted tools, including artificial intelligence (AI), to help identify and evaluate candidates. All hiring decisions are ultimately made by human reviewers. For details, please visit the About Us tab on the Johnson Controls Careers site at https://jobs.johnsoncontrols.com/about-us