The extension would seek to identify further suitable drier sites for coal mining development.
Rosengren will commence his duties at Realm on January 8 2018 and will become a member of the company's
BGR Group, a senior lobbying firm in Washington, continues to meet with relevant US Government Officials.
The company is now enjoying strong cash flows.
Peabody placed the Burton Mine on care, maintenance and rehabilitation in December 2016.
Cooroorah is located just down dip of Wesfarmer's Curragh mine.
The Millennium Mine shares coal infrastructure with the adjacent BHP Mitsui Coal Poitrel project.
Kerr said the company was not anti-union and dealt with unions at many places and "have a great relationship".
The company had proved a successful coal separation process.
The move would lift the mine's presence.
The Westfield tenement is located at the edge of the Great Artesian Basin.
The company reported total saleable coal production of 2.3 million tonnes.
Cooroorah is located just down dip of Wesfarmer's Curragh mine and abuts the Jellinbah mine.
Coal production is expected to start in the first quarter of 2018.
Cultural Heritage surveys have been concluded for the areas required.
Production at Yancoal's 50% owned Middlemount joint venture was down 2%.