Bronwyn Killmier has worked in a variety of operational management and policy areas in South Australia police, including uniform and criminal investigation at both metropolitan and rural locations within the state.  She has also worked at a management level interstate and overseas.

In 1991, she attended a one-year Fellowship program at the FBI Academy, Quantico, Virginia.  This Fellowship was in criminal investigative analysis, commonly known as offender profiling.  Bronwyn was awarded the Australian Police Medal in 1997 for her work in this area. 

Between 1998 and 2007, she held various operational and criminal investigation country and metropolitan management positions.   She also undertook reviews into intelligence led policing, the Major Crash section and Custody Management, with all recommendations implemented.  

In 2003, she undertook a three month secondment to Kent Police, United Kingdom. 

In May 2007, she was promoted to Assistant Commissioner.

In January 2013, she became Assistant Commissioner for Metropolitan Operations Service and is responsible for the six metropolitan local service areas, including the central business district, transit policing and the newly formed State Tactical Response Group.  She also has portfolio responsibility for  high risk driving, Operation Mantle (low level drug dealing), Safe Streets, taxi related crime and custody management.  Assistant Commissioner Killmier is currently studying a MSt in Applied Criminology and Police Management at Cambridge University.

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Prior to joining the Australian Federal Police, Assistant Commissioner Debbie Platz enjoyed a 30 year career with the Queensland Police Service, commencing when she was sworn in on 27 September 1985.

As a First Year Constable she was transferred to Cairns Police Station.  Following a wide range of duties in Cairns and then in  Brisbane City,  Assistant Commissioner Platz was transferred in 1990 to the North Coast Region where she successfully gained her Detective Appointment and for many years was involved in the investigation of child protection issues, criminal investigations and juvenile related crimes.

Assistant Commissioner Platz has had a broad range of operational and managerial roles. She was promoted to Sergeant in Police Prosecutions where she prosecuted many trials, including committal proceedings for murder, rape and sexual offences against children.

As a Senior Sergeant she was involved in the Legal Services Branch, where she managed the Training Unit which was responsible for the training of Queensland’s prosecutors and brief managers.

In 1997 she was selected as a member of a Rotary Group Study exchange program where she travelled to Canada and studied proactive, community based, problem solving policing initiatives.  In 1999 she was one of 15 people from within Australian to be given a 2 year scholarship on ethics and leadership.  This scholarship challenged her across a wide range of areas and took her to Vietnam to seek initiatives to combat domestic violence and to the Northern Territory to experience policing in Indigenous communities.  This scholarship culminated in receipt of the Vincent Fairfax Ethics in Leadership Award.

Assistant Commissioner Platz was promoted to Inspector in the North Coast Region in 2000 where she worked as the staff officer to the Commissioner, the Ministerial Liaison Officer and the District Officer of the North Coast Region.

She has been heavily involved in review processes having  managed the internal review of Information Communications and Technology; was seconded to the Service Delivery and Performance Commission which conducted a review of the Queensland Police Service; and the 2011 Flood Crisis Review Group. 

In January 2014 Assistant Commissioner Platz was in charge of the People Capability Command. This Command is responsible for all training and development of police, two police academies, a leadership centre, recruiting, workplace safety and wellbeing

Assistant Commissioner Platz has a Masters of Business (University of the Sunshine Coast), a Graduate Diploma in Education (Secondary/VET) (University of the Sunshine Coast) and a Masters of Studies (Applied Criminology) on a Wakefield scholarship from the University of Cambridge, United Kingdom.

Crime Operations

As Assistant Commissioner of Crime Operations she am responsible for the Crime Operations – Response portfolio and the Victim Based Crime portfolio.  Crime Operations - Response investigate a broad range of crime types including drug importations and firearms trafficking and have teams situated in each State and Territory. Crime Operations – Response is also responsible for investigating matters considered to be politically sensitive including those that are likely to be of particular interest to, or may have the ability to adversely impact on, the Commonwealth Government, a Member of Parliament, or any other politically significant figure.

Our Victim Based Crime (VBC) function aims to reduce the incidence and impact of Commonwealth crimes against the person. Whilst VBC traditionally focused on Child Exploitation, Human Trafficking and People Smuggling the function has recently expanded responsibilities to include Australian citizens harmed or missing overseas such as kidnap victims or Australians who are seriously injured or killed as a result of criminal activity or a critical incident. VBC also delivers and contributes to a number outreach and prevention programs and efforts pertaining to missing persons and exploited children as well as management of Australian citizens and/or their family through our Family Investigative Liaison Officers (FILO) program, who have suffered harm as a result of critical incident.

Assistant Commissioner Debbie Platz is responsible for Crime Operations in the Australian Federal Police.  She moved to the AFP in 2017 after having 30 years with the Queensland Police Service. 


Mr Stephen A Brown APM, M.St (Cantab)

Deputy Commissioner (Operations)

Office of the Deputy Commissioner (Operations)

Western Australia Police

Awards:       Australian National Police Medal (APM)




Joining the Western Australia Police in 1983, Mr Brown’s 33 year police career has seen him serve as a general duties and traffic officer across metropolitan and country areas; and 11 years as a detective where he specialised in the investigation of organised criminal groups and homicide.

Promoted to commissioned rank in 2001 Mr Brown became the Senior Investigator within WA Police Royal Commission Investigation Team. Promoted to Superintendent in 2005, Mr Brown was instrumental in building the investigative capacity of the Internal Affairs Unit and delivering a number of the Kennedy Royal Commission’s reform recommendations.

In 2007 Mr Brown was appointed Superintendent in charge of the South East Metropolitan Police District and in that year he was awarded the Australian Police Medal for his services to the community.

In 2008, having led the South East Metropolitan Police District Mr Brown was promoted to Assistant Commissioner Traffic & Operations Portfolio and in 2009 he assumed responsibility of policing the Perth Metropolitan Region. In 2010 as Acting Deputy Commissioner (Operations) Mr Brown assumed the role of State Commander (Business Continuity) during the Commonwealth Heads of Government Meeting (CHOGM).

In November 2012, Mr Brown was promoted to the position of Deputy Commissioner (Specialist Services & Reform) and appointed the executive lead for the Western Australia Police’ comprehensive and fundamental reform program - Frontline 2020. 

In 2016 Mr Brown as awarded a Master of Studies in Applied Criminology and Police Management from Cambridge University. Mr Brown’s studies, which were directly supervised by internationally renowned Criminologist Professor Lawrence W. Sherman have been primarily focused on what works; what doesn’t; and what promising in Planning for an Agency-wide Tipping Point in Evidenced-Based Policing. 

In his spare time Stephen is the devoted husband of Mary (WA Police Superintendent State Operations Division); he has four children aged 33; 25; five and four years; he is a motorcycle enthusiast; lover of fine red wine; and restaurant-class chef. 


Superintendent Dave Cowan has been with Victoria Police for 26 years and has experience as a detective and a prosecutor and has lead a range of reforms in the summary criminal justice system.  He currently manages the Community Safety Division within the Corporate Strategy and Operational Improvement Department.  The Division comprises of 5 Units including the Drug and Alcohol Strategy Unit, the Victims Advisory Unit, the Safer Communities Unit, Diversion Alignment Project and the newly formed Policing Innovation and Research Unit. 

Prior to moving to the current role, Dave lead a range of organisational wide reviews including a review of Counter Terrorism leading to the establishment of the CT Command.  He lead a review of persons in police custody which resulted in the reclassification of all custody facilities state-wide and cells upgrades at 80 locations. He lead a governance review of Family Violence which resulted in the establishment of the first Family Violence Command in Australia.  He also reviewed volume crime scene services in Victoria Police and implemented the Frontline Volume Crime Strategy.   Dave recently lead the development of the Victoria Police Corporate Plan 2016 -2018 which shapes the future direction of the organisation aligned to the Blue Paper.

Dave has a Graduate Diploma in Executive Leadership and in 2013 was awarded the Australian Institute of Police Management, Australasian Policing Scholarship where he undertook studies at the JFK Harvard Kennedy School of Government.