Senior Mechanical Engineer - PE Required

Job Description

Job Description

Benefits:

• 401(k)
• 401(k) matching
• Competitive salary
• Dental insurance
• Employee discounts
• Flexible schedule
• Health insurance
• Opportunity for advancement
• Paid time off
• Relocation bonus
• Training & development
• Vision insurance

About the Role:
This is an on-site position based in San Diego, California for a licensed Mechanical Professional Engineer who wants to lead the engineering and technical execution of complex commercial HVAC and mechanical system designs, mentor developing engineers and designers, coordinate multidisciplinary projects, and contribute to the continued growth of a rapidly expanding MEP engineering firm.

Compensation & Benefits:
Annual Salary Range: $130,000–$149,000 , based on experience, qualifications, and demonstrated technical expertise.

At 120 Degreez, we invest in our team's long-term success—professionally and personally.

• 401(k) with up to 3% employer match
• 70% employer-paid medical insurance + 100% dental and vision
• $1,500 annual professional development and certification allowance
• Paid Company Holidays + 2 weeks of Paid Time Off (PTO) + 1 week Paid Sick Leave
• 100% employer-paid life insurance
• Clear career advancement pathway from Designer through Principal
• Collaborative, structured, and growth-focused work environment

Who This Role Is For:

• You take ownership of delivering technically excellent engineering solutions
• You enjoy mentoring engineers and designers while continuing to expand your technical leadership
• You have extensive experience designing U.S.-based commercial mechanical systems
• You want to grow into future department leadership and Principal-level opportunities

What You'll Do:

• Engineer and oversee HVAC, ventilation, exhaust, hydronic, refrigeration (as applicable), and other mechanical building systems for commercial projects
• Prepare and review engineering calculations, equipment selections, specifications, and construction documents utilizing Revit and AutoCAD
• Perform HVAC load calculations, energy compliance, equipment sizing, ductwork and piping design, and system analysis
• Coordinate mechanical engineering designs with electrical, plumbing, architectural, structural, and civil disciplines
• Review project drawings for technical accuracy, constructability, and compliance with company QA/QC standards
• Mentor Mechanical Designers, Engineers, and Project Managers while supporting technical development across the department
• Participate in client meetings, project coordination meetings, and internal design reviews
• Support Project Managers with technical guidance while maintaining project schedules, budgets, and quality expectations
• Seal engineering documents in accordance with applicable licensing requirements when appropriate

What Success Looks Like (First 90 Days):

• Fully integrated into project teams and company workflows
• Leading engineering efforts on multiple commercial projects with minimal supervision
• Providing technical mentorship and engineering guidance across project teams
• Building strong client and internal relationships while consistently delivering high-quality engineering solutions

Non-Negotiable Requirements:

• Active Professional Engineer (PE) license (California preferred)
• 10+ years of U.S.-based commercial mechanical engineering experience
• Strong proficiency in Revit, AutoCAD, Carrier HAP, TRACE 3D Plus, Bluebeam, or other industry-standard mechanical engineering software
• Experience preparing engineering calculations, equipment selections, specifications, and construction documents for commercial MEP projects
• Thorough understanding of the California Mechanical Code (CMC), California Building Code (CBC), California Energy Code (Title 24), ASHRAE standards, SMACNA standards, and applicable industry codes
• Experience performing HVAC load calculations, energy modeling coordination, equipment selection, duct and piping system design, and multidisciplinary coordination
• Experience mentoring junior engineers and designers
• Excellent communication, organization, and project management skills
• Ability to manage multiple projects while meeting deadlines

Work Authorization:
We are not able to provide visa sponsorship for this role. Candidates must be authorized to work in the United States without current or future sponsorship requirements.

Who Should NOT Apply:

• Candidates without an active Professional Engineer (PE) license
• Candidates without U.S.-based commercial MEP engineering experience
• Candidates requiring current or future visa sponsorship
• Engineers seeking production-only roles without technical leadership responsibilities
• Candidates seeking remote or hybrid positions