Mechanical Engineer

Job description

**Role Summary:** $90-95k annually Must be located in: Orlando, FL; Dallas, TX; or Portland, OR. Under the direction of the Engineering & Estimating Manager -National, the Mechanical Engineer is responsible for supporting the Engineering and Estimating team across the full project lifecycle, including load calculations, system design, bidding support, client presentations, field deployment, and post-project documentation. This is an engineering-track role with exposure to a wide variety of industries and applications. The day-to-day work is office-based, with travel for site visits, client meetings, and emergency response. **Essential Job Functions:** - Perform load calculations — cooling, heating, moisture, and ventilation — for temporary climate solutions across construction sites, industrial and manufacturing facilities, food production plants, automotive and battery plants, aerospace facilities, data centers, commercial buildings, and labs - Perform psychrometric chart analyses and study weather to inform design decisions - Design temporary systems from Polygon’s equipment fleet - Develop project layouts, equipment schedules, and sequences of operation tailored to each client’s environment and process needs - Support the estimating process: take-offs, equipment selection, scope development, and pricing inputs for bids and proposals - Prepare and present engineered solutions to clients, general contractors, and internal sales teams - Translate technical decisions into clear, client-friendly language - Serve as the engineering resource for the field technician team during equipment deployment, startup, commissioning, and troubleshooting - Travel to project sites on short notice when needed — for emergency response, project kickoffs, complex deployments, or field issues that require engineering oversight - Translate field observations into improvements to design and project execution - Develop and maintain Standard Operating Procedures (SOPs) for specific systems, applications, and key clients - Create technical documentation, including system narratives, commissioning checklists, monitoring plans, and project closeout packages - Build out engineering templates and reference materials to improve consistency and efficiency across the team **Job Qualifications:** - Bachelor’s degree in Mechanical Engineering or a related field - Solid understanding of thermodynamics, heat transfer, and HVAC fundamentals - Comfortable with psychrometric calculations - Strong written and verbal communication skills, with the ability to explain technical concepts to engineers, salespeople, technicians, and clients - MS Office proficiency across the board, with Excel as a particular strength - Demonstrated CAD experience - Willingness to travel on short notice, including occasional nights and weekends for emergency response - Valid US driver’s license and the ability to work on construction and industrial job sites **Preferred Training Requirements and Competencies:** - EIT certification - 1–3 years of experience in HVAC, mechanical contracting, temporary climate solutions, dehumidification, or a related field - Exposure to construction sites, manufacturing facilities, food production, automotive or battery plants, aerospace, data centers, or controlled environments such as labs, cleanrooms, and pharmaceutical facilities - Familiarity with building codes, OSHA site safety, and standard PPE requirements - Experience supporting estimating, sales, or field service teams **Demonstration of the Polygon Values:** - Integrity - Excellence - Empathy