Former Johnson Winter & Slattery partner Fiona Melville has been appointed to the Middletons partnership in Sydney.

For the last 14 years, Melville has specialised in energy and resources law and is a leader in the development of trading electricity, gas, carbon and environmental products.

"Fiona is one of Australia's leading advisers to participants in the electricity and gas sectors. Fiona is called upon for her expertise in major project developments, electricity and gas wholesale and retail trading and greenhouse gas reporting," said Middletons managing partner, Nick Nichola.

"Fiona is the first port of call for companies seeking advice in dealing in environmental products such as carbon permits and renewable energy certificates and is well across energy regulatory issues."