National Accreditation Board for Testing 
  & Calibration Lab ( Govt. of India )
  American Bureau of Shipping
  Bureau Veritas
  Bax Counsel Inspection bureau pvt. Ltd.
  Bharat Heavy Electricals Ltd.
  Chemtex Engineering India Ltd.
  Chempro Inspection  Pvt. Ltd.
  Chief Inspectorate of Warship
  Equipment, Indian Navy.
  Development Consultants Ltd.
  Director General of Supplies & Disposals.
  Defence Research Development 
  Laboratory, Hyderabad.
  Kvaernar Power gas India Ltd.
  Det Norske veritas
  Driplex Water Engineering Ltd.
  Engineers India Ltd.
  Export Inspection Agency, 
  Sub-Office, Thane.
  Humphreys & Galsgow Consultants ( I ) Ltd.
  Indian Register of Shipping.

Ion Exchange India Ltd.
Industrial Consulting Bureau ( ICB LTD. )
Industrial Inspection Bureau.
Konkan Railway Corporation Ltd.
Lloyds Register Industrial Services ( I ) Ltd.
Larsen & Toubro  Ltd.
Metlab Services.
National Thermal Power Corporation Ltd.
Project Development of India Ltd.
Rail India Technical and Economic Services.
Steam Boiler Directorate Maharashtra State.
SGS India Ltd.
Toyo Engineering India Ltd.
Tata  Consulting  Engineers.
TUV India Ltd.
Thermax Pvt. Ltd.
UHDE India Ltd.
Bhabha Atomic Research Centre
Oil & natural gas Corporation
Godrej & Boyce Mfg. Co. ltd.
Directorate General Quality Assurance
Shipping Corporation of India