Commercial Mechanical Engineer HVAC (Mid-Level).

Company Overview: Commercial Mechanical Engineer – HVAC (Mid-Level).

 USA Mechanical & Energy Service has been in business since 2003  and is a top-rated HVAC-R service company. USA Mechanical & Energy Services continues to be a family business built on a reputation of dependable, quality, and trusted service completing projects on schedule. We are a full-service mechanical contractor providing 24/7 HVAC Service & Maintenance. 

 The company partnered with Orion Services Group in September 2021. Orion Services Group is a private equity-backed company focused on acquiring leading commercial field services companies in HVAC, landscaping, and other essential service industries. Orion partners with world-class, founder-owned service providers to build industry leading platforms that perform the essential services that keep America running. With their People-First approach, they aim to foster an environment in which the best talent and field technicians call home.

 Position Summary:

The Mid-Level HVAC Mechanical Engineer is responsible for the design, analysis, and implementation of heating, ventilation, air conditioning systems & plumbing for commercial, industrial, and/or institutional facilities. This role involves independently managing HVAC & plumbing design tasks, coordinating with multidisciplinary teams, and ensuring systems meet performance, energy efficiency, code, and client requirements. This position will be full-time in-house position in East Granby, CT.

Key Responsibilities:

• Design HVAC systems including heating, cooling, ventilation, and control systems for new construction and retrofit projects.
  • Perform load calculations (heating and cooling), equipment sizing, and system selection.
  • Develop and review HVAC layouts, ductwork, piping, and equipment schedules using CAD/BIM tools.


• Develop and review plumbing layouts, sanitary & waste, venting, and domestic water.


• Prepare construction documents, specifications, and design narratives for our estimating team to prepare a proposal for the account manager.
  • Ensure designs comply with applicable codes and standards (e.g., ASHRAE, IMC, NEC, local building codes).
  • Coordinate HVAC designs with architectural, structural, electrical, plumbing, and fire protection disciplines.
  • Review shop drawings, submittals, and RFIs during construction.
  • Support commissioning activities and assist with field inspections and troubleshooting.
  • Evaluate system performance, energy efficiency, and life-cycle costs.
  • Mentor entry-level engineers and contribute to technical reviews.

Required Qualifications:

• Bachelor’s degree in Mechanical Engineering or related field.
  • 3–7 years of HVAC engineering experience.
  • Proficiency with HVAC design software and tools (e.g., AutoCAD, Revit, HVAC load calculation software).
  • Strong understanding of thermal systems, fluid mechanics, and psychometrics.
  • Experience designing HVAC & plumbing systems for commercial or industrial buildings.
  • Ability to interpret and apply building codes and engineering standards.
  • Strong analytical, organizational, and communication skills.

Preferred Qualifications:

• Experience with energy modeling or sustainable design (LEED, high-performance buildings).
  • Knowledge of building automation and control systems.
  • Working knowledge of ASHRAE standards and energy codes.
  • Engineer-in-Training (EIT) or Professional Engineer (PE) license.
  • Experience with healthcare, laboratory, data center, or mission-critical facilities.

Benefits:

• Medical/Dental/Vision Insurance.


• 401(K) with Employer Match Contributions.


• PTO.


• Paid Holidays.


• Long-term Disability.


• Short-term Disability.


• Accidental Insurance.


• Hospital Indemnity Insurance.


• Critical Illness Insurance.


• Pet Insurance .


• Multiple Annual Employee Appreciation Events and more.

USA Mechanical & Energy Service is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.