![James Giumelli](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Net worth: 72 M $ as of 2026-08-30
James Giumelli is currently the Chief Executive Officer at Ertech Pty Ltd. and Ertech Holdings Pty Ltd.
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
Duratec Ltd.
 Duratec Ltd. Engineering & ConstructionIndustrial Services Engages in protection and remediation of steel and concrete 18.34% | 2025-08-31 | 47,348,514 ( 18.34% ) | 72 M $ | 2026-08-30 |
| Companies | Position | Start |
|---|---|---|
Ertech Pty Ltd.
 Ertech Pty Ltd. Engineering & ConstructionIndustrial Services Provides civil construction services | Chief Executive Officer | - |
Ertech Holdings Pty Ltd.
 Ertech Holdings Pty Ltd. Engineering & ConstructionIndustrial Services Provides contracting services to clients in the oil and gas, mining, government and utilities infrastructure, waste and land development sectors | Chief Executive Officer | - |
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| Private companies | 2 |
|---|---|
Ertech Pty Ltd.
Ertech Pty Ltd. Engineering & ConstructionIndustrial Services Provides civil construction services | Industrial Services |
Ertech Holdings Pty Ltd.
Ertech Holdings Pty Ltd. Engineering & ConstructionIndustrial Services Provides contracting services to clients in the oil and gas, mining, government and utilities infrastructure, waste and land development sectors | Industrial Services |
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