Mechanical Engineer
General Description
Lee Mechanical is looking for a sharp, field-aware Mechanical Engineer with 5+ years of experience in commercial and industrial HVAC design. This is a design/build role — not a consulting engineer position. We don’t sell drawings to third parties. We create smart, buildable, and cost-effective systems that we install and stand behind ourselves.
As a full-service mechanical, electrical, plumbing, and fire protection (MEPFP) contractor, we rely on our in-house engineers to drive the front-end design and ensure performance on the back end. You’ll lead HVAC system design, help coordinate cross-trade efforts, and serve as a key resource for temperature controls, commissioning, and real-world troubleshooting. If you know how systems work in practice — not just in theory — and thrive in an environment where design and construction are tightly linked, this is the job for you.
Essential Duties and Responsibilities:
- Design mechanical systems (primarily HVAC) for in-house design/build projects — with a focus on constructability, performance, and value.
- Coordinate directly with project managers, field leaders, and clients to align design with real-world needs and site conditions.
- Perform HVAC load calculations, equipment selection, and system layout using load calculation software.
- Produce coordinated construction documents in collaboration with CAD/BIM teams.
- Conduct field walks to assess existing conditions, support installs, and troubleshoot during commissioning.
- Interface with temperature controls contractors, assist in developing control sequences, and validate system operation.
- Support project teams during commissioning and turnover, helping ensure systems perform as designed.
- Stay current on code changes, technology, and energy efficiency trends relevant to mechanical systems.
- Assist estimating and preconstruction teams with system concepts and budget alignment.
Key Competencies/Qualifications:
- Must have at (3) years or more electrical experience.
- Knowledge of NEC and Electrical Theory.
- Ability to work independently with little or no supervision, as part of a team, and lead others.
- Strong communication skills.
- Knowledge of electrical codes.
- Clean valid driver’s license.
- Drug screening required.
- Experience reading drawings and blueprints a plus.
- Ability to estimate and write change orders a plus.
- Minimum OSHA 10, OSHA 30 preferred.
Who Thrives in this Role
- An engineer who sees design and construction as a single, integrated process.
- Someone who can bridge the gap between the office and the field — not just draw, but deliver.
- A well-rounded technical expert with a strong foundation in HVAC and working knowledge of MEPFP systems.
- Someone who’s comfortable in the weeds with controls, sequences, start-up, and troubleshooting.
- A proactive, communicative team player who thrives in a collaborative setting.
Minimum Qualifications
- Bachelor’s Degree in Mechanical Engineering or related field.
- 5+ years of HVAC design experience, ideally within a mechanical contracting environment.
- Strong understanding of field construction practices and how to design systems that get built right.
- Proficiency in AutoCAD, Revit, and industry-standard load calc software.
- Solid grasp of codes, ASHRAE standards, and multi-trade system coordination.
- Experience with temperature controls, system sequences, and functional testing/commissioning.
- Strong written and verbal communication skills.
- EIT or PE preferred (or a clear plan to obtain).
- Valid driver’s license and ability to visit project sites as needed.
Physical Requirements
- Office-based with regular travel to active job sites.
- Ability to walk sites, review installations, and interact with field personnel.
- Must be able to sit, type, talk, and work with computer systems.
Why Lee Mechanical is Right for You
We’re more than just a top-tier contractor — we’re a place where people build careers, not just projects. Recognized multiple times by the Milwaukee Business Journal as one of the Best Places to Work, Lee Mechanical is proud of our family-focused, community-driven, and high-performance culture.
We offer:
- Flexible Work Options – Remote-friendly where practical, with a focus on results and balance.
- Best-in-Class Teammates – Work with the most skilled professionals in the industry.
- Work Hard, Play Hard – We take the job seriously, but not ourselves.
- Community First – We support local causes, encourage giving back, and invest in our people.
Reasonable Accommodation Statement
We will provide reasonable accommodations to qualified individuals with disabilities to help them perform the essential functions of this role.
Equal Opportunity Statement
Lee Mechanical is an equal opportunity employer. We value diversity and are committed to creating an inclusive environment for all employees.
