At the time of this interview, Robert Bradley was the interim component manager ofsafety and security at the Justice Sector Development Programme in Freetown, Sierra Leone. His career in policing began in 1966 when he joined the former Australian Capital Territory police. In 1967, he was drafted into the army and he served in Vietnam. On his return to Australia in 1969, Bradley was reappointed to the ACT police. He participated in community policing in Jervis Bay and later, he worked on criminal investigations and in the Juvenile Aid Bureau. Bradley also served in the general policing division, which dealt primarily with positions related to United Nations work such as recruitment and training of officers for overseas deployment. He was a part of the U.N. missions to Cyprus, Cambodia and Mozambique. In 1995, Bradley resigned from the police force and set up police training programs in Bosnia, Eastern Slovenia, Mongolia and other areas.  

At the time of this interview, Peter F. Zaizay was Liberia's deputy minister for administration and the acting minister for national security. He began his career in private security in 1986. He worked with the Jascere Security Services. In 1992, Zaizay joined the Liberian National Police, and he worked in the Patrol Division, the Criminal Investigation Division and the Criminal Intelligence Unit. He also served as an assistant director of police for press and public affairs from 2004 to 2006. Later, he became the deputy director of police for training and then the commandant of the National Police Training Academy, a position he held from 2006 to 2007.

At the time of this interview, Ramchristen Haveria was the deputy district commander for the United Nations Integrated Mission in Baucau, Timor-Leste. He previously worked at the regional operations office in the Philippines. Also, he served concurrently as the station chief of the Police Community Relations Office and as the chief of the Internal Affairs Office. He also worked as the chief of the Drug Enforcement Unit and as the assistant chief of the Special Operations group. He was involved in U.N. missions in Timor-Leste and Kosovo. 

At the time of this interview, Carlos Humberto Vargas García was the chief of studies at the National Academy of Public Security in El Salvador, an institution separate from the national police. From 1992 to 1995, he was the first sub-director of the academy, and he trained in the U.S. and Central America with ICITAP, the International Criminal Investigative Training Assistance Program. He also worked in the private sector, in other universities in El Salvador as a professor of engineering, and for the Instituto Salvadoreño de Formación Profesional, which is in charge of non-formal education.

At the time of this interview, Giorgio Butini was police adviser to the Office of the EUSR/ EU Commission Delegation in Skopje, Macedonia. A lieutenant colonel of the Italian State Police with 18 years of active service, in 2001 he joined the United Nations mission in Kosovo, where he served for more than a year as deputy regional commander in the Pec/Peja Region.  In 2003 he went to Brussels as a police expert during the Italian presidency of the European Union.  In October 2003 he was part of the planning team in Brussels and Skopje that launched Proxima,  the EU police mission in the former Yugoslav republic, where he served for two years, first as central coordinator and then as deputy head of program.  Co-author of a manual on international police missions, he was also a trainer at the European Police Academy beginning in 2002.

At the time of this interview, Ranjit Singh Sardara was the chief of operations of the United Nations Police in Manatutu, Timor-Leste. He served in the Royal Malaysian Police for 27 years. His experience spanned community policing, traffic cases, crime prevention, and operations and intelligence. Sardara was also a part of the U.N. mission in Bosnia-Herzegovina. He served as an election officer in Visegrad; he held the post of deputy station commander and later, station commander. Sardara also served as the deputy regional commander of Sarajevo.

Neil Pouliot served as the commander of the military and civilian police components of United Nations Mission in Haiti from 1994 to 1996. In this role, he worked with the government of Haiti to maintain and safe and secure environment, prepare for elections, provide interim security, and oversee police services development. Prior to his work in Haiti, Pouliot worked with the Royal Canadian Mounted Police in Canada, including as the officer in charge of national/international drug operations. He also served as a course coordinator and lecturer at the Canadian Police College and as a resource person for the U.N. Division of Narcotics and Interpol. Pouliot also served as the officer in charge of the Security Offenses Branch for the Criminal Intelligence Directorate in Ottawa and the director of Criminal Intelligence Services Canada, an organization tasked with coordinating intelligence in Canada and internationally through the RCMP and other police forces. At the time of this interview, Pouliot was retired as chief superintendent and was working as a consultant with RCMP.   

At the time of this interview, Iver Frigaard was the acting police commissioner for the United Nations Interim Administration Mission in Kosovo, a post to which he was appointed in May 2008 by the U.N.'s Department of Peacekeeping Operations. Educated as a lawyer and with a military background, he became a public prosecutor with the police in Norway. After 11 years in the security services, he spent another 11 years with Interpol in France before joining UNMIK in Kosovo in 2007 as deputy commissioner for crime.

At the time of this interview, Chief Superintendent Dave Beer was serving as the director general of international policing for the Royal Canadian Mounted Police, a position that included peace-operations deployments, liaison with INTERPOL, and oversight of the international operations branch, the visits and travel branch, and the international affairs and policy branch.  Beer led or participated in policing development missions under the auspices of the Canadian International Development Agency, the United Nations Department of Peacekeeping Operations and the U.S. State Department.  Although he spent the most time in Haiti, partially due to his being bilingual in French and English, he also served in Liberia, Central African Republic and Iraq.