Our team of knowledgeable engineering professionals develop reliable and practical design solutions of any scale.


Our experienced team of Mechanical engineers have established a reputation of efficiency and resourcefulness.  OES offers mechanical engineering design for critical facilities and non-critical facilities:

Non-Critical Facilities

Building HVAC Systems
Premium Efficiency Heat Pump Systems
Geothermal Systems
Water Source Heat Pump Systems
Domestic, Sanitary and Storm Sewer Piping
System Design
Hot Water Storage System Design
Hot Water Storage Heating
Plumbing Systems
HVAC System Commissioning

​​Critical Facilities

​HVAC & Process Piping

3D Coordination Drawings for BIM

​Fuel Storage & Distribution

Thermal Energy Storage

Humidity Control Systems

Critical Cooling Plant and Distribution Systems

Building Automation Systems

Chilled Water and Boiler Plants

Computer Room AC Systems

Building Load and Energy Analysis

Medical Gas Design


Our Electrical engineers leverage state of the art tools and software to provide our clients with customized analysis and design.    Our team delivers innovative and cost effective solutions for every project in every market sector.  

Engineering for work environments, office buildings, and industrial facilities, 

Engineering design and analysis for critical environments such as Data Centers and Hospitals

Electrical power system studies/analysis using SKM Power*Tools, Cymcap, ETAP & AmpCalc:

AC & DC systems analysis

  Short circuit & equipment evaluation

  Protective device coordination

  Electric shock arc flash risk assessment (NFPA 70E/IEEE 1584)

  Underground cable heating analysis (Neher-McGrath)

Commissioning and design of parallel generation systems.

Lighting system photometric analysis.

Energy code (IECC, COMCheck, etc.) compliance