Mechanical Contractor & Integrater
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License/Corporate Information:

NAICS Codes:

  • California Corporation:  C2287240
  • DVBE & Small Business (Micro) Certified:  31248
  • License #:  814348;  C-20 & C-4
  • TIN:  47-0863092
  • DUNS #:  12-942-3294
  • CAGE/Sam #:  3CRQ4
  • SIC Code:  1711, 3580, 3585

238220:   HVAC/Mechanical Contractor

221330:   Steam and HVAC Supply

541330:   HVAC Engineering Services

561210:   Facility support services for Mechanical & HVAC

561790:   Other services to buildings & dwellings

811310:   Commercial, industrial machinery & equipment repair and maintenance



Who we are and what we do:



Engineered Mechanical Services, Inc. (EMSI) was formed in 2002 to integrate solutions for mechanical and HVAC systems.  We are a Service Disabled Veteran owned company and certified Small Business. 



  • Services we provide:
    • Mechanical contracting (piping:  copper, stainless, steel & other), ducting, controls
    • 24/7 HVAC service and maintenance
    • Engineering design for mechanical and HVAC systems
    • Commissioning for mechanical systems (certified ACG agent)
    • Energy auditing
    • Mechanical system analysis for energy upgrades


  • Markets we serve:
    • Industrial
    • Large commercial
    • Federal (military and GSA), State
    • Hospitals
    • Other end users with mechanical systems needs


  • We have extensive experience servicing these systems:
    • 4-pipe chilled and hot water, VRF (variable refrigerant flow), geothermal, DX (direct expansion)
    • VAV (variable air volume)
    • Ice & Thermal Storage (load shift), Natural gas cooling and heating


Service Area:

Counties of:  San Diego, Riverside, Orange, Imperial


Our Clients include:

 Solar Turbines, Inc., General Atomics Aeronautical Systems Inc., General Atomics, Jack in the Box

“Leading with Knowledge, following with Pride”