Senior Mechanical Engineer (HVAC/Pluming)

NAI Consulting Engineers; Pasadena (CA); On-site; USD 90,000 - 130,000; Full time

Job summary

NAI Consulting Engineers in Pasadena seeks a Senior Mechanical Engineer (HVAC/Plumbing) to lead building systems design for commercial, institutional, and residential projects. This on-site role involves designing calculations, sizing equipment, and producing detailed construction documents.

You will coordinate with internal teams, collaborate with external partners, review submittals, and perform site visits to support construction administration.

Qualifications

• Bachelor’s degree in Mechanical Engineering or related field.
• PE license preferred or eligibility.
• Experience in HVAC and plumbing system design for buildings.
• Strong writing and communication skills.

Responsibilities

• Lead mechanical design for HVAC and plumbing systems.
• Coordinate with electrical and plumbing teams; review drawings.
• Prepare construction documents and specifications.
• Mentor junior engineers and ensure code compliance.
• Perform site visits to support construction administration.

Skills

Mechanical engineering

HVAC design

Plumbing design

Project management

Code compliance

Mentoring

Technical writing

CAD tools

Education

Bachelor's degree in Mechanical Engineering

PE license or eligibility

Tools

CAD tools

Revit / BIM

Energy modeling

Job description

Company Description

NAI Consulting Engineers is a professional firm specializing in Mechanical, Electrical, and Plumbing (MEP) engineering services for a wide range of building projects. The team provides design and consulting support that focuses on safety, efficiency, and reliable system performance. NAI collaborates closely with architects, owners, and contractors to deliver integrated engineering solutions tailored to each project’s requirements. The company promotes practical innovation and technical excellence to help clients meet regulatory standards and project goals.

Role Description

The Senior Mechanical Engineer (HVAC/Plumbing) will provide technical leadership for building systems design, focusing on heating, ventilation, air conditioning, and plumbing in commercial, institutional, and residential projects. This full-time, on-site role in Pasadena, CA involves preparing mechanical design calculations, sizing equipment, and developing detailed construction documents and specifications. Day-to-day responsibilities include coordinating with internal electrical and plumbing teams, collaborating with external design partners, reviewing drawings and submittals, and performing site visits to assess existing conditions and support construction administration. The role also includes mentoring junior engineers, ensuring code compliance, managing project timelines and deliverables, and contributing to quality control and continuous improvement of design standards.

Qualifications

• Strong foundation in Mechanical Engineering with experience in HVAC and plumbing system design for buildings.


• Proficiency in Machine Design and Research and Development (R&D) for mechanical systems and components as needed.


• Hands-on experience with Computer-Aided Design (CAD) tools for creating and reviewing mechanical drawings and models.


• Demonstrated Project Management skills, including planning, coordination, scheduling, and stakeholder communication.


• Bachelor’s degree or higher in Mechanical Engineering or a closely related field.


• Professional Engineer (PE) license in Mechanical Engineering, or eligibility and intent to obtain licensure, preferred.


• Working knowledge of relevant building codes and standards (e.g., ASHRAE, local plumbing codes, mechanical codes).


• Ability to lead design efforts, mentor team members, and collaborate effectively in a multidisciplinary environment.


• Excellent technical writing, documentation, and communication skills.


• Experience with energy modeling, Revit or BIM tools, and sustainable design practices is a plus.