Senior Mechanical Engineer

• 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.

• Lead the execution of complex HVAC system designs using advanced engineering techniques and technologies.
• Conduct energy modeling, life cycle cost analysis, and feasibility studies for proposed systems.
• Drive innovation in system selection, integration, and sustainability strategies.
• Oversee the production of construction documents and specifications

• Provide mentorship and technical guidance to junior and mid-level engineers.
• Coordinate cross-discipline design efforts and lead internal quality reviews.
• Manage scope, schedule, and deliverables on key projects.
• Support proposal development and pursuit strategy, including go/no-go planning.

• Build and maintain strong relationships with clients and industry partners.
• Attend client meetings and lead technical discussions.
• Support business development efforts through project interviews, client presentations, and marketing activities.

• HVAC load calculations and energy analysis
• Equipment selection and system layout
• Ductwork and hydronic piping system design
• Controls and automation system design
• Plumbing and domestic water systems
• Code compliance, LEED integration, and sustainable design best practices

• Bachelor’s degree in Mechanical Engineering or related field
• Licensed Professional Engineer (PE) required
• 15+ years of experience in mechanical building systems design
• Strong proficiency in AutoCAD, Revit, and Microsoft Office Suite
• Excellent communication, leadership, and mentoring skills
• Proven ability to manage complex projects and deliver high-quality outcomes
• Familiarity with energy modeling software (e.g., Trane TRACE, EnergyPlus) is a plus

• 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

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!

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