Sr. Mechanical Design Engineer

BBSI; San Jose (CA); On-site; USD 75,768 - 103,320; Full time

Benefits offered by this job

Medical, Dental, and Vision Insurance

Disability Insurance and HSA

Company-Paid Life Insurance

Premium health coverage options

Competitive compensation with commission structure

Team-building events

Job summary

A mechanical design-build firm is looking for a Senior Mechanical Engineer who will lead HVAC designs and mentor junior engineers. Responsibilities include ensuring compliance with California building codes, performing design reviews, and collaborating with project managers. The ideal candidate has 7–10+ years of commercial HVAC design experience and a Bachelor’s degree in Mechanical Engineering. The position offers competitive pay ranging from $55.00 to $75.00 per hour plus full benefits.

Qualifications

• 7–10+ years of experience in commercial HVAC design.
• Professional Engineer (PE) license preferred but not required.
• Strong understanding of HVAC systems, equipment, and construction practices.

Responsibilities

• Lead HVAC system design from initial concept to execution.
• Ensure design compliance with California codes and standards.
• Mentor junior engineers and enhance team performance.

Skills

HVAC system design

Technical design leadership

Mentorship

Compliance with California codes

Education

Bachelor’s degree in Mechanical Engineering

Tools

AutoCAD

Carrier HAP

Trace 700

Job description

Job Category: Full Time – Direct Hire Opportunity

Pay Range: $55.00 - $75.00/Hour + Full Benefits

BBSI is partnering with a respected mechanical design-build firm to hire a Senior Mechanical Engineer who wants more than just producing drawings.

This is a hands‑on, high‑impact position where you will lead HVAC system design, influence project outcomes, and collaborate closely with project managers and field teams while mentoring junior engineers.

Position Overview

The Senior Mechanical Engineer serves as a technical lead designer responsible for delivering code-compliant, buildable, and well‑coordinated mechanical designs from concept through construction. This role has full ownership of project deliverables and provides technical leadership without direct personnel management responsibilities.

Key Responsibilities

• Technical Design Leadership
• Lead HVAC system design from basis of design through permit and issued‑for‑construction documents
• Establish system selection, equipment sizing, and control strategies
• Design both air‑side systems (VAV, DOAS, exhaust, pressurization, heat recovery) and water‑side systems (hydronic plants, pumping, valves, heat rejection)
• Ensure compliance with California codes, energy standards, and local AHJ requirements
• QA/QC and Engineering Excellence
• Oversee quality control of load calculations, duct and pipe sizing, equipment schedules, and design details
• Perform thorough design reviews to ensure accuracy, coordination, and field constructability
• Coordination and Field Integration
• Partner with Project Managers to present systems and solutions to clients and stakeholders
• Participate in site walks and existing condition assessments
• Provide construction‑phase support including submittal reviews, RFIs, and design clarifications
• Mentorship and Team Support
• Guide and mentor junior engineers on design fundamentals, codes, and best practices
• Contribute to improving engineering standards, processes, and overall team performance

Minimum Qualifications

• 7–10+ years of experience in commercial HVAC design
• Bachelor’s degree in Mechanical Engineering or equivalent
• Professional Engineer (PE) license preferred but not required
• Strong understanding of HVAC systems, equipment, and construction practices
• Proficiency in Carrier HAP, Trace 700, EnergyPro, or similar tools
• Proficiency in AutoCAD; Revit experience preferred
• Strong knowledge of California building codes and energy requirements
• Medical, Dental, and Vision Insurance
• Disability Insurance and HSA
• Company‑Paid Life Insurance
• Premium health coverage options
• Competitive compensation with commission structure
• Team‑building events