Professor Mark Peter Umstad – For significant service to medicine in the field of obstetrics, particularly complex pregnancies, as a clinician, consultant and academic. Roger John Underwood – For significant service to the community of Western Australia through forestry and bushfire management, and as an historian and writer. Professor Robert Vink – For significant service to medicine, particularly in the field of neurotrauma, as a researcher, author, educator and advocate, and to the community. Dr Elsina Margaret Wainwright – For significant service to international affairs, through Australian defence, foreign policy and conflict prevention studies, as an analyst and academic. Mark Anthony Watt – For significant service to the community, particularly to disadvantaged and at-risk youth, through social welfare support organisations. Trevor Francis Weatherhead – For significant service to the beekeeping industry as an apiarist, to developing biosecurity policy, and to professional beekeeping associations. Professor Anthony Steven Weiss – For significant service to science in the field of biotechnology, as an academic, researcher, author and mentor, and through executive roles with scientific institutions. Gregory Byrne Whitby – For significant service to education in the Catholic school system as a leader, administrator, advocate and teacher. Vivienne Mary White – For significant service to education through leadership in the development of initiatives that support disadvantaged students and schools. Lawrence Leslie Wilson – For significant service to the community through philanthropic support, particularly for medical research organisations and art scholarship funds. Anthony Richard Wood – For significant service to conservation and the environment, particularly in the areas of energy policy, climate change, and sustainability. Professor David George Wood – For significant service to chemical engineering education as a researcher, mentor and academic, and to professional organisations. Professor Barbara S Workman – For significant service to geriatric and rehabilitation medicine, as a clinician and academic, and to the provision of aged care services. Professor Richard Keith Wortley – For significant service to criminology and psychology through the development of security and crime science education. Ronald Warren Woss – For significant service to youth, particularly to support for research into suicide prevention, and to the community through a range of charitable organisations. Dr Dennis Charles Young – For significant service to community health in Queensland through alcohol and drug treatment support programs, and to the community. Military Division Reference: Commodore Mark David Hammond, – For exceptional service to the Australian Defence Force in senior command and