LTC executed projects for the numerous clients either through its parent companies or directly. Some of the major clients are:

Indian Clients :

1. Oil India Limited(OIL),Assam
2. Gas Authority of India Limited, Baroda
3. Indian Petrochemical Corporation Limited, Baroda
4. Cairn Energy India Pty. Ltd., Chennai
5. Chennai Petroleum Corporation Limited, Chennai
6. Indian Oil Corporation Ltd. Delhi for petroleum refining projects in their various refineries like, Panipat Refinery, Digboi Refinery, Barauni Refinery, Haldia Refinery, Gujarat Refinery, Guwahati Refinery etc.
7. Kochi Refineries Limited, Kochi
8. Shriram Fertilizer & Chemicals Ltd., Kota
9. Bharat petroleum Coproration Limited, Mumbai
10. Hindustan Petroleum Corporation Limited(HPCL),Mumbai
11. Oil & Natural Gas Corporation Ltd., Mumbai
12. ONGC-Mangalore Petrochemicals Limited (OMPL), Mangalore
13. Indian Oil Corporation Limited including Paradip Refinery, Mathura Refinery, Haldia Refinery
14. HPCL-Mittal Energy Investments Limited (HMEL), Bhatinda

Overseas Clients :

1. Abu Dhabi Gas Industries Co.(GASCO), Abu Dhabi
2. Abu Dhabi Gas Liquefaction Co.(ADGAS), Abu Dhabi
3. Abu Dhabi Oil Refining Company(Takreer), Abu Dhabi
4. Ruwais Fertilizer Industries, Abu Dhabi
5. Bahrain Petroleum Co., Bahrain
6. Karnaphuli Fertilizers Company Limited(KAFCO),Bangladesh
7. BA Energy Inc., Canada
8. Haldor Topsoe A/S, Denmark
9. Kashima Oil Refinery, Japan
10. Melaka Refinery, Malasiya
11. Petronas, Malaysia
12. Foster Wheeler Italiana, Milan
13. Oman Refineries & Petrochemicals Co.(ORPC), Oman
14. Qatar Fertiliser Co.(S.A.Q), Qatar
15. Qatar Fuel Additives Co. Ltd., Qatar
16. Qatar Shell GTL Limited, Qatar
17. Ras Gas, Qatar
18. Ras Laffan LNG Company Limited, Qatar
19. SAFRA Co. Ltd., Saudi Arabia
20. Saudi Formaldehyde Chemical Co. Ltd, Saudi Arabia
21. Saudi International Petrochemical Company, Saudi Arabia
22. OJSC Taneco Refinery, Tatarstan-Russia
23. Thai Olefins Co. Ltd.,Thailand
24. Consolidated Contractors International Company S.A.L., UAE
25. Saudi Aramco Total Refining and Petrochemicals Company, Saudi Arabia
26. Singapore Eastern Petroleum Limited, Singapore