Mechanical Engineer

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.
Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities
This employer is required to notify all applicants of their rights pursuant to federal employment laws.
For further information, please review the Know Your Rights notice from the Department of Labor.