| 1963 03 |
Mr. Jae-jun Lee inaugurated as the CEO and President |
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| 1964 03.31 |
Constructed Yeongweol Thermoelectric Power Plant No.2 |
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| 1965 11.25 |
Installed water turbines for Cheongpyeong Hydroelectric Power Plant No.2 |
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| 1966 01.28 |
Made entry into Vietnam (Rach-Gia Port pile-driving project) |
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| 1966 04.19 |
Constructed the Gwanghwamun Underground Walkway |
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| 1967 12.31 |
Constructed the Ulsan Port Harbor No.1 |
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| 1967 01.07 |
Constructed the Busan Thermoelectric Power Plant Unit # 3&4 |
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| 1967 03.24 |
Constructed Gyeongin (Seoul-Incheon) Expressway |
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| 1968 02.01 |
Constructed Gyeongbu (Seoul-Busan) Expressway |
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| 1968 07.12 |
Constructed Donghae Thermoelectric Power Plant |
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| 1969 05.05 |
Constructed Namsan Children’s Center |
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| 1969 05.08 |
Constructed Honam Thermoelectric Power Plant |
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| 1969 07.17 |
Constructed the National Assembly House |
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| 1971 02.22 |
Constructed Yeoeuido Square |
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| 1971 03.24 |
Constructed Yeongdong Expressway (Singal - Saemal: 13.6㎞) |
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| 1971 04.12 |
Constructed Seoul Metropolitan Railway Line No.1 |
