Licenses
| Category | Area | License # | Organization | Date acquired |
|---|---|---|---|---|
| Engineering business | Soil and geological characteristics | E-9-1390 | Korea Engineering & Consulting Association (KENCA) | 1993. 7. 29 |
| Construction engineering management | Design and project management | Gyeonggi 1-2-266 | Gyeonggi-do | 2015. 7. 7 |
| Mining hazard prevention | Prevention and reversal of ground settlement Soil amelioration and remediation Prevention of mine tailing runoff |
2006-13 | Ministry of Knowledge Economy | 2006. 9. 18 |
| Soil remediation | 2007-11 | Han River Water Shed Environmental Management Office | 2007. 4. 25 | |
| Expert on soil related work | Soil environmental assessment | 2014-4 | Han River Water Shed Environment Management Office | 2014. 6. 26 |
| Groundwater | Construction works for ground water development and use | Seocho 4 | Seocho-gu Office | 1999. 5. 12 |
| Groundwater remediation | Seongnam 2008-1 | Seongnam-si | 2008. 3. 18 | |
| Agency for investigating impact on groundwater | Seongnam 2008-1 | Seongnam-si | 2008. 9. 2 | |
| New and renewable energy | 11 energy sources including solar, wind and geothermal | 2007-963 | Ministry of Knowledge Economy | 2007. 4. 12 |
| Expert on engineering and construction works | Boring and grouting | Seongnam 08-12-1 | Seongnam-si | 2008. 2. 19 |
| Civil engineering work | Seongnam 08-02-6 | Seongnam-si | 2008. 9. 25 | |
| Facility maintenance and management | Seongnam 08-29-4 | Seongnam-si | 2008. 7. 1 | |
| Mechanical construction | Seongnam 16-10-9 | Seongnam-si | 2016. 8. 31 | |
| Registering overseas construction project | Construction engineering | 258 | Ministry of Land, Transport and Maritime Affairs | 2005. 3. 23 |
| Boring and grouting | 111 | Ministry of Land, Transport and Maritime Affairs | 2005. 3. 23 | |
| Civil engineering work | 376 | Ministry of Land, Transport and Maritime Affairs | 2005. 3. 23 | |
| Facility maintenance and management | 97 | Ministry of Land, Transport and Maritime Affairs | 2005. 3. 23 |
