Mechanical Engineer

Job Description

**Role Summary:**

$90-95k annually

Under the direction of the Engineering \& Estimating Manager -National, the Project 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