Worley chief executive Chris Ashton says the global engineering group could pursue claims for work done in Ecuador through the South American country’s courts after a $58 million write-down crimped a rebound in interim net profit to $106 million.

Worley swung back into profit from a $99 million loss a year earlier as earnings from providing engineering services to the energy, chemicals and resources projects increased, boosting group revenue 13 per cent to $6 billion.