The ideal candidate has experience in HVAC systems design for residential and commercial applications. This role will require day-to-day activities such as equipment sizing, AutoCAD/Revit drafting, collaboration with all other disciplines on the design team, as well as managing 1-2 mechanical designers/drafters.

Job Type: 40 hours/week. In-Office.

Salary range of $70,000-90,000/yr depending on experience.

Job Responsibilities

Mechanical HVAC design (equipment sizing, AutoCAD/Revit drafting) for residential and commercial applications)

Prepare construction drawings and technical specifications

Design coordination and collaboration with disciplines on design team

Attend site visits for verification of existing MP systems

Attend design coordination meeting in person and via video chat

Respond to plan check, contractor and client/owner design comments

Manage a team of 1-2 mechanical designers/drafters

The position is for in office, not remote

Experience

3-5 years’ minimum experience in mechanical HVAC design for residential and commercial applications

Experience in sizing and selecting HVAC cooling/heating systems

Ability to prepare construction drawings and technical specifications

Experience with design coordination and collaboration

Intimate knowledge of California building codes

Ability to work independently with basic design direction

Proficient in AutoCAD drafting

Additional compensation if the applicant has Revit experience

Proficient in Microsoft word and excel

Construction administration experience (submittal review, construction contractor collaboration for RFI responses, site visits, project closeout)

Comfortable interacting with clients via video chat and face to face for meetings

The ideal candidate has experience in HVAC systems design for residential and commercial applications. This role will require day-to-day activities such as load calculations, equipment sizing, AutoCAD/Revit drafting and collaboration with all other disciplines on the design team.

Job Type: 40 hours/week. In-Office.

Salary range of $60,000-85,000/yr depending on experience.

Job Responsibilities

Mechanical HVAC design (equipment sizing, AutoCAD/Revit drafting) for residential and commercial applications)

Prepare construction drawings and technical specifications

Design coordination and collaboration with disciplines on design team

Respond to plan check, contractor and client/owner design comments

The position is for in office, not remote

Experience

1-5 years’ experience in mechanical HVAC design for residential and commercial applications

Experience in sizing and selecting HVAC cooling/heating systems

Ability to prepare construction drawings and technical specifications

Experience with design coordination and collaboration

Intimate knowledge of California building codes

Ability to work independently with basic design direction

Proficient in AutoCAD drafting

Additional compensation if the applicant has Revit experience

Proficient in Microsoft word and excel

Construction administration experience (submittal review, construction contractor collaboration for RFI responses, site visits, project closeout)

Comfortable interacting with clients via video chat and face to face for meetings

We are open to training the right candidate.

The ideal candidate has experience in plumbing design/drafting. This role will require drafting and sizing of plumbing systems and coordinating with our in-house HVAC team.

Job Type: 40 hours/week. In-Office.

Salary range of $50,000-70,000/yr depending on experience

Job Responsibilities

AutoCAD/Revit drafting

Apply redline markups from a project engineer and produce construction documents

Sizing plumbing piping systems for water, gas, waste/vent systems

Interact and communicate effectively with other team members and disciplines.

Assist in submittal and RFI reviews

Assist in plan check, contractor and client/owner design comments

Remain up to date in developments within the profession and within the organization as appropriate

Comfortable interacting with clients via video chat and face-to-face for meetings

Experience

1-3 years experience in AutoCAD drafting for residential and commercial applications

Proficient in AutoCAD drafting

Additional compensation if the applicant has Revit experience

Proficient in Microsoft word and excel

Effective written and verbal communication skills

Ability to take responsibility for given tasks

Desire to expand skillset for equipment sizing and selection on water heaters, air compressors, interceptors…etc

San Luis Obispo (5+ Years Experience)

Location: San Luis Obispo, CA
Type: Full-Time
Salary: $70,000–$120,000/year (DOE) + Comprehensive Benefits

About 3C Engineering Inc.

At 3C Engineering Inc., we’re a leading engineering firm delivering innovative HVAC solutions for residential and commercial projects across California. Based in San Luis Obispo, we focus on energy-efficient systems and a collaborative environment. Join us to advance your career while enjoying the coastal lifestyle.

About the Role

As a Senior HVAC Mechanical Engineer, you’ll lead HVAC projects, designing systems for diverse clients. Work with architects, contractors, and our team to deliver quality designs from concept to completion. Benefit from hybrid work flexibility and opportunities to mentor junior staff.

What You’ll Do

• Design HVAC systems, including equipment sizing, ductwork, and controls, using AutoCAD and Revit.

• Prepare construction drawings and specifications compliant with California building codes.

• Coordinate with project stakeholders to ensure smooth execution and resolve design issues.

• Conduct site visits to verify MEP systems and address field challenges.

• Mentor 1–2 junior designers/drafters, ensuring high-quality deliverables.

• Manage construction administration tasks, including RFIs, submittals, and plan checks.

What We’re Looking For

• 5+ years of experience in HVAC engineering for residential and commercial projects.

• Proficiency in AutoCAD (Revit experience preferred).

• Strong knowledge of California building codes and energy standards.

• Ability to lead cross-disciplinary coordination and manage project timelines.

• Effective communication skills for client and team interactions (in-person or virtual).

• Proficiency with Microsoft Word/Excel for documentation.

Why Join Us?

• Competitive Salary: $70,000–$120,000/year, based on experience.

• Comprehensive Benefits: 401(k) with matching, health insurance, health savings account, paid time off, tuition reimbursement, and professional development support.

• Career Growth: Lead impactful projects and guide junior staff while expanding your expertise.

• Collaborative Team: Work with passionate engineers focused on innovation.

Schedule

• 8-hour shifts, Monday to Friday.

How to Apply

We seek direct applications from qualified candidates (no recruiting agencies, please).