- Adyar Ananda Bhavan
- Allison Transmission India Pvt Ltd
- Ashok Leyland Properties Ltd.,
- Audco India Ltd.
- Arunachalam & Co.
- Amrutanjan Ltd., Chennai.
- Alpatan Chemicals Ltd.,
- Brakes India Limited-Padi, Chennai.
- Bharat Heavy Electriclas Ltd.
- Blow Packaging Pvt. Ltd.
- Cancer Institure
- CPWD
- Chemplast Sanmar Groups
- Dunlop India Limited., Ambattur
- DLF Infocity Developers(Chennai) Ltd.
- Defence Department.
- Easun Group, Chennai.
- Elforge Ltd.,
- Ford India Ltd.
- Gammond India Ltd
- Ganesan Builders
- Godrej Boyce Mfg. Co. Ltd., Tiruvellore.
- Harinarayanan Structural (P) Ltd
- Hindustan Petroleum Corporation Ltd.
- Hindustan Motors Ltd.
- Infosys Ltd.,
- IVR Prime Urban Developers Ltd.
- J K Tyre & Industries Ltd
- Kothagari Sugars and Chemicals, Karaikal
- KCP Sugars and Industries Ltd.
- Lucas TVS Limited
- Larsen and Toubro Limited
- MRF Ltd.
- McDowell & Co.
- Motherson Automotive Ltd.
- Nokia India Ltd.
- Polaris Software Ltd.
- Ramaniyam Real Estate Pvt Ltd (Groups)
- Reserve Bank of India. Chennai.
- Samho Gunyoung Construction (P) Ltd/Lotte Chocolate
- Shapoorji Pallonji & Co.Ltd
- Scott Willson Kirkpaprick & Co. Ltd - UK
- SRF Ltd., Manali.
- SSPDL Interserve Pvt Ltd
- State PWD
- SIPCOT, Cuddalore.
- S. Subramaniam Construction Pvt. Ltd.
- TTK & Co. Chennai.
- The Corramendal Engineering Co., Ltd., Chennai
- Tamil Nadu Road Development Co. Ltd.
- Visteon Automotive Systems India Pvt. Ltd.
- Wheels India Ltd.
