On Line Design is currently helping a customer, in Cincinnati, OH, fill a full-time Senior Mechanical Engineer with a background in Industrial and Commercial HVAC/Process Systems. You will play a pivotal role in designing, analyzing, and certifying complex hydronic and HVAC systems. In this role you will be asked to collaborate with project managers, sales, and field operations to deliver code-compliant, construction-ready solutions that power critical facilities.

Responsibilities:

Lead the design and engineering of mechanical and hydronic systems for design-build projects
Review, seal, and approve permit-ready drawings (Ohio PE required)
Provide engineering oversight and mentor junior designers
Ensure all designs meet IMC, IFGC, ASHRAE, and energy code requirements
Develop calculations and system models using Carrier HAP, AutoCAD, Revit, and Excel
Support quality control reviews and participate in client-facing technical meetings

Qualifications:

Ohio PE License (required); KY/IN PE or ability to obtain within 12 months
5+ years of mechanical/HVAC design experience with strong hydronics competency
Experience with industrial process systems; ammonia refrigeration experience is a plus
Proven background in commercial/industrial projects
Proficient in load calculation software and CAD/Revit platforms
Strong knowledge of codes and design best practices

Additional Skills:

Computer-Aided Design (CAD)
Revit
Industrial Engineering
Mechanical Systems
Hydronics/Steam
Boilers
Chilled Water
HVAC
Ammonia Refrigeration
Commercial Projects

On Line Design, Inc. is an equal opportunity employer and does not discriminate based on age, race, religion, color, sex, national origin, marital status, physical or mental disability, genetics, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws.

On Line Design, Inc.

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HVAC Mechanical Engineer