Why You’ll Love Working Here:

• A culture that values integrity, teamwork, and professional growth
• Opportunities to lead and contribute to game-changing projects
• An ownership mindset—our ESOP structure means your success is our success
• Competitive compensation & benefits
• Emphasis on work-life balance and flexibility
• A leadership team that listens and supports your ambitions

At Guernsey, we’re more than engineers, architects, and consultants—we’re changemakers with a shared purpose. We’re driven by curiosity, united by collaboration, and committed to building a better future—together. We’re redefining what it means to work in the AEC industry, blending innovation with integrity and giving every employee a real stake in the outcome. Here, your ideas matter, your growth is prioritized, and your career has limitless potential.

What You’ll Be Doing:

Design & Technical Contributions

• Assist in the design of HVAC systems using advanced engineering tools and methodologies
• Support energy modeling, life cycle cost analysis, and system feasibility studies
• Perform load calculations and assist with equipment sizing and selection
• Design and layout ductwork and hydronic systems
• Contribute to plumbing and controls system designs
• Prepare specifications and coordinate with drawings from other disciplines
• Stay current with applicable codes, standards, and sustainability practices

Project Support & Coordination

• Collaborate with internal team members across disciplines to meet project deadlines and quality standards
• Participate in internal reviews, project meetings, and site visits as needed
• Support project documentation and submittals
• Provide technical input during proposal development and project planning

What You Bring to the Team:

• Bachelor of Science in Mechanical Engineering or related field (required)
• 5–15 years of mechanical design experience in the AEC industry
• PE license (required); if not licensed in Oklahoma, must obtain within two years
• Proficient in AutoCAD, Revit, Microsoft Office Suite
• Familiarity with HVAC load and energy modeling tools (e.g., Carrier HAP, Trane TRACE)
• Strong communication skills and ability to work effectively on multi-discipline teams
• Willingness to travel to project sites as needed

Essential Physical Functions: 

• Sit/stand at a desk or computer
• Walk, stoop, stand and move around job sites
• Travel and occasional site visits requiring stooping, standing, and lifting up to 30 lbs.
• Frequent communication via phone, video, or in-person meetings
• Ability to focus on digital and paper-based information for extended periods
• Some project-based travel may be required

Let’s Build the Future Together!

If you’re ready to make an impact, challenge the status quo, and grow with a forward-thinking, employee-owned company, we want to hear from you. Apply now and let’s create something extraordinary!

We Are an Equal Opportunity Employer

Guernsey is proud to be an Equal Employment Opportunity/Affirmative Action employer.