-
Indian Oil Corporation Ltd (Vadodara, Digboi, Panipat, Guwahati, Barauni, Haldia, Mathura)
-
Gas Authority Of India Ltd (Lakwa, Auraiya, Vijaipur, Vaghodia, Ussar, Hazira, Ujjain, Gandhar, Rajamundhry)
-
Indian Petrochemicals Corporation Ltd(Vadodara, Dahej & Nagothane)
-
Chemical Petroleum Corporation Ltd(Chennai), (DHDS & Maintenance)
-
Kochi Refineries Ltd, (Kochi) (DHDS, LPG, Tank Form Auto, Expansion & Maintenance)
-
Bharat Petroleum Corporation Ltd, (DHDS)
-
Rashtriya Chemicals & Fert.Ltd, Raigad-402 208
-
Hindustan Petroleum Corporation Ltd, Mahul Rafinery (Slack-Wax/Hexane/DHDS/Maint)
-
Hindustan Petroleum Corporation Ltd Marketing Division (Various Marketing Terminals)
-
Indian Oil Corporation Ltd, Marketing Divison (Various Marketing Terminals)
-
Numaligarh Refinery Ltd, Numaligarh (Proj & Maint)
-
I.S.G.E.C.Yamunanagar (IOCL-DHDS)
-
Bongaigaon Refinery & Petrochemicals Ltd, Bongaigaon, Dist Dhaligaon (Proj & Maint)
-
Bharat Oman Refineries Ltd, (Bina Refinery)
-
Gujarat State Fertilizers & Chemicals Ltd (Vadodara) (Melax, Nylon6, Capro, Internal Proj & Maint)
-
Gujrat Chemicals Port Terminal Company Ltd Dahej-Bharuch392 130 (Port Project)
-
Reliance Industries Ltd(Pathalganga & Hazira)
-
Larsen & Toubro Ltd.(ECC Construction Group Chennai & EPC Centre-Baroda, IOCL-Digboi)
-
Toyo, Mumbai (MRPL, I&LL, CFCL,IPCL, ETPS, IOCL Haldia-NSUM Mathura, Haldia Petro, LNG-Dahej)
-
Manglore Refinery & Petrochemicals Ltd, (Phase-I& II & Sulphur Recovery Unit )
-
Chambal Fertilizes & Chemicals Ltd, Gadepan(Kota)
-
M/S Atomic Energy –Kota/Chennai (BARC) 21 Forbes Marshall Arca Ltd, Pune (NPCL)
-
Dresser-Rand India Ltd, Ahmedabad (For ONGC & Other Project)
-
Hyundai Heavy Industries Company Ltd (DHDS –HPCL MAHUL Refinery)
-
TICB LTD. (IOCL- Haldia-Dhds, MCF-Manglore)
-
National Fertilizers Ltd, Bathinda
-
TECHNIP (KTI-HPCL/KRL/CPCL) DHDS PROJECTS
-
Thirumalai Chemicals Ltd- Ranipet
-
Uhde India Ltd-Mumbai(GSFC-SIKKA, GFCL-KAKINDA, WCPM –DANDELI, DRIPL- Tamil Nadu, QAFCO-Qatar)
-
MECON Ltd, (KISCO Ltd, Kudremukh / Gail-Pragati Power)
-
Tata Honey Well Ltd –Pune (IOCL – Barauni)
-
Triveni Engineering & Industries Ltd, Banglore (CFCL-Gadepan Expansion –II)
-
Deepak Fertilizers & Petrochemical.Corp.Ltd,(IPA-Taloja)
-
TN Petroproducts Ltd, Chennai-600 068.
-
Kaveri Ultra Polymers Ltd, Kolkata (Nalco Project)
-
Bridge And Roof Co.(India) Ltd, Kotkata & Mumbai (IOCL-AU-V/GGS VII & GGS-VII Baroda)
-
Artson Engineering Ltd, (ONGC- Uran, HPCL-Mahul)
-
Milton Roy India (P)Ltd, Chennai
-
TPS Builders Ltd, Chennai (IOCL-Gujarat / Panipat) Finolex Industries Ltd, Pune / Ratnagiri