Comfort Systems USA Ohio is growing our Cincinnati team, and we’re looking for an experienced, practical, and customer-focused Mechanical Engineer with direct professional experience in commercial HVAC and hydronic building systems.

This role is ideal for an engineering professional who enjoys being close to the work, partnering with sales and operations teams, evaluating real-world building systems, and developing practical solutions that can be successfully priced, built, installed, and maintained.

Please note: This position requires prior professional experience working directly with commercial or industrial HVAC systems, hydronic systems, mechanical construction, retrofit projects, design-build solutions, or commercial MEP engineering. General mechanical engineering experience, academic coursework, university projects, research, manufacturing engineering, or product development experience alone will not meet the experience requirements for this position.

As the Mechanical Engineer – Commercial HVAC & Hydronics, you will serve as a key technical resource for our Cincinnati and Northern Kentucky market. You will work closely with Sales, Project Managers, Estimators, Foremen, Supervisors, field personnel, and customers to evaluate existing HVAC and hydronic systems and develop practical engineered solutions for construction, retrofit, replacement, and design-build opportunities.

This is not a traditional engineering role where your work stays on paper. You will be expected to understand how mechanical systems operate in real buildings, participate in customer site visits, assess existing equipment and field conditions, and help develop solutions from initial concept through construction, startup, and closeout.

• Serve as a primary mechanical and HVAC engineering resource for the Cincinnati and Northern Kentucky market.
• Evaluate existing commercial and industrial HVAC and hydronic systems, including equipment, piping, ventilation, drawings, controls interfaces, field conditions, and customer requirements.
• Conduct and participate in customer site visits and existing-building system assessments.
• Partner with Sales to understand customer needs, evaluate mechanical system challenges, and provide technical direction for proposed solutions.
• Develop practical, cost-effective engineered solutions for commercial HVAC, hydronic, piping, ventilation, equipment replacement, and mechanical system improvement projects.
• Support load calculations, equipment selection, system layouts, scopes of work, estimates, proposals, and design development.
• Review mechanical drawings, specifications, equipment schedules, piping diagrams, and existing system documentation.
• Collaborate with Project Managers, Estimators, Foremen, Supervisors, and field teams from initial concept through construction, startup, and closeout.
• Provide technical support when field conditions, equipment limitations, installation challenges, or system performance issues arise.
• Help customers understand technical options, system performance, lifecycle considerations, energy efficiency, and long-term reliability.
• Ensure proposed solutions consider applicable codes and standards, constructability, serviceability, operating conditions, and cost.

• Bachelor’s degree in Mechanical Engineering or a closely related engineering discipline.
• At least 3 years of professional experience working directly with commercial or industrial HVAC systems, hydronic systems, mechanical construction, retrofit projects, design-build projects, or commercial MEP engineering.
• Professional experience evaluating existing commercial building systems and developing practical, field-aware mechanical solutions.
• Professional experience with several of the following:
  • Chilled water systems
  • Hot water systems
  • Steam systems
  • Boilers
  • Pumps
  • Cooling towers
  • Air-handling units
  • Commercial ventilation systems
  • Hydronic piping systems
  • HVAC equipment replacement and retrofit projects
• Experience conducting or supporting site surveys and evaluating existing mechanical equipment and field conditions.
• Working knowledge of HVAC load calculations, equipment selection, mechanical system design, and applicable codes and industry standards.
• Ability to interpret mechanical drawings, specifications, equipment schedules, piping diagrams, and as-built drawings.
• Strong problem-solving skills and the ability to translate technical findings into practical recommendations.
• Strong communication skills and the ability to work effectively with customers, sales professionals, project managers, estimators, and field personnel.
• Must currently reside in, or be willing to relocate to, the Cincinnati/Northern Kentucky metro area.
• Must be authorized to work in the United States without current or future visa sponsorship. Employment-based visa sponsorship or immigration support is not available for this position.

• Experience working for a mechanical contractor, commercial HVAC contractor, MEP engineering firm, design-build contractor, or similar commercial building systems organization.
• Experience with HVAC retrofit, equipment replacement, renovation, or existing-building improvement projects.
• Experience working directly with HVAC technicians, installers, foremen, estimators, or project managers.
• Experience with AutoCAD, Revit, Bluebeam, Carrier HAP, Trace 3D Plus, or similar engineering and design tools.
• Professional Engineer licensure or Engineer-in-Training certification is a plus but not required.

This role is a strong fit for a mechanical or HVAC engineering professional who:

• Has professional, real-world experience with commercial HVAC and hydronic building systems.
• Enjoys evaluating existing systems and solving practical mechanical challenges.
• Is comfortable visiting customer sites and working alongside sales, operations, project management, and field teams.
• Understands that a successful engineered solution must not only work technically but also be practical to price, build, install, operate, service, and maintain.
• Wants to see their work move from an initial customer need through design, construction, startup, and operation.