WDS Limited is an Australia-based company. The Company is engaged in providing specialist services to the underground coal mining industry and to the infrastructure, oil, gas and water pipeline construction and maintenance sectors in Australia. It has two operating divisions: construction, which includes provision of specialist pipeline design, construction and maintenance services to the oil, gas and water sectors, and mining, which includes provision of skilled labor and specialist mining equipment to the underground mining industry. The Company's subsidiaries include Walter Mining Pty Ltd, Walter Engineering (Mackay) Pty Limited, Walter SE Asia Private Limited and Delco Energy Australia Pty Limited. On July 31, 2008, WDS acquired 100% of the shares in Delco Energy Australia Pty Limited. On April 30, 2009, WDS acquired 20% of the shares in Ackroyd Engineering Services Pty Ltd. On October 20, 2009, the Company completed the acquisition of Titeline Energy Pty Ltd.