![]() Monadelphous Monadelphous is an engineering group providing construction, maintenance, and industrial services. | ![]() GS E&C GS E&C (formerly known as Lucky Development) is an EPC (engineering, procurement, and construction) contractor specializing in architecture, civil engineering, petrochemical, and power plants construction activities. | ||
Founding Date | Founding Date 1999 | Founding Date 1972 | Founding Date 1969 |
Type | Type Private | Type Public | Type Public |
Tags | |||
Locations | Locations Birtinya, AU HQ East Arm, AU Emerald, AU Emungalan, AU Evans Landing, AU Nhulunbuy, AU Wedgefield, AU | Locations Victoria Park, AU HQ Bibra Lake, AU Capel, AU Chinchilla, AU East Arm, AU East Perth, AU Gladstone, AU see more | |
Employees | Employees 6252% increase | Employees 7,289 | Employees 5,4691% increase |
Financial | |||
Revenue (est.) | Revenue (est.) N/A | Revenue (est.) $2.2b (FY, 2025) | Revenue (est.) ₩12.5t (FY, 2025) |
Cost of goods | Cost of goods N/A | Cost of goods $737.3m (FY, 2025) | Cost of goods ₩10.9t (FY, 2025) |
Gross profit | Gross profit N/A | Gross profit $1.4b (FY, 2025) | Gross profit ₩1.6t (FY, 2025) |
Net income | Net income N/A | Net income $83.7m (FY, 2025) | Net income ₩93.4b (FY, 2025) |

Monadelphous is an engineering group providing construction, maintenance, and industrial services.
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GS E&C (formerly known as Lucky Development) is an EPC (engineering, procurement, and construction) contractor specializing in architecture, civil engineering, petrochemical, and power plants construction activities.
View company