About the job
Job Title: Mechanical Design Engineer
Location: St. Louis, MO, USA
Experience: 3–5 Years
Job Type: Full-Time, W2
Work Arrangement: Onsite
Salary Range: $60,000 – $90,000 per year (Depending on experience and qualifications)
Job Summary
We are seeking a skilled and detail-oriented Mechanical Design Engineer with 3–5 years of experience in the Architecture, Engineering, and Construction (AEC) industry to join our engineering team in St. Louis, MO.
The ideal candidate will have experience in mechanical systems design for commercial, residential, institutional, or industrial buildings, with a strong understanding of HVAC systems, building codes, and mechanical engineering principles.
The candidate will be responsible for designing, developing, and coordinating mechanical systems while working closely with multidisciplinary engineering teams, architects, and project managers.
Key Responsibilities
- Design and develop HVAC and mechanical systems for commercial, residential, and industrial building projects.
- Prepare mechanical layouts, construction drawings, equipment schedules, and design documentation.
- Perform heating and cooling load calculations, equipment sizing, and ductwork design.
- Design HVAC systems, including air distribution, ventilation, exhaust, and piping systems.
- Coordinate mechanical designs with structural, electrical, plumbing, and architectural teams.
- Prepare and review mechanical construction documents and technical specifications.
- Ensure designs comply with applicable building codes, ASHRAE standards, IMC, and other relevant industry regulations.
- Assist with equipment selection, specifications, and technical evaluations.
- Conduct site visits, field inspections, and provide construction-phase engineering support when required.
- Identify design conflicts and coordinate solutions with project stakeholders.
Required Qualifications
- Bachelor's degree in Mechanical Engineering or a related field.
- 3–5 years of mechanical design experience within the AEC industry.
- Strong experience in HVAC system design for building projects.
- Knowledge of heating and cooling load calculations.
- Understanding of ductwork design, ventilation systems, and mechanical equipment selection.
- Experience preparing mechanical construction drawings and documentation.
- Familiarity with ASHRAE standards, International Mechanical Code (IMC), and applicable building codes.
- Ability to coordinate with multidisciplinary engineering teams.
Technical Skills & Software
Candidates should have experience with some or most of the following:
- AutoCAD MEP – Mechanical layouts and construction drawings.
- Revit MEP – 3D modeling and BIM coordination.
- Trane TRACE 3D Plus / HAP – HVAC load calculations and energy analysis.
- Bluebeam Revu – Drawing reviews and markups.
- Microsoft Office – Technical documentation and reporting.
Preferred Qualifications
- Experience working on commercial, healthcare, educational, or industrial building projects.
- Knowledge of energy-efficient HVAC design and sustainable building practices.
- Familiarity with BIM workflows and multidisciplinary coordination.
- EIT certification or progress toward Professional Engineer (PE) licensure is a plus.
- Experience with US-based AEC projects is preferred.
- Strong HVAC design and engineering fundamentals.
- Hands-on experience with AutoCAD and Revit MEP.
- Ability to independently handle mechanical design assignments.
- Strong communication and problem-solving skills.
- Understanding of US building codes and engineering standards.
- Ability to work in a collaborative, fast-paced engineering environment.
