Diezani Alison-Madueke

On 28 August 2017, a Nigerian federal court seized 7.6 billion naira ($21 million) from bank accounts linked to Alison-Madueke.

She has been charged with responsibility for $20 billion missing from the Petroleum agency. A former Central Bank of Nigeria (CBN) governor, Sanusi, made the comment again during a PBS interview on 2 December 2015. Sanusi believes he was fired from the Central Bank of Nigeria because he went public with charges that $20 billion was missing from the Nigerian National Petroleum Corporation (NNPC) under Alison-Madueke's management. Alison Madueke says Sanusi made the allegations to retaliate after she didn’t help him to get appointed as the president of the African Development Bank (AfDB) and dismissed his allegation.

On 2 October 2015, Reuters reported that Alison-Madueke had been arrested by the UK's National Crime Agency (NCA) in London, along with four other people on suspicion of bribery and corruption offences. However, a spokesperson for the police denied having any knowledge of the incident. Her family and the Nigerian Government confirmed that she had been arrested in London, although the NCA declined to comment on the case.

Alison-Madueke was the first woman to hold the position of Minister of Petroleum Resources in Nigeria, and in October 2010 she became the first woman to head a country delegation at the semi-annual OPEC conference. She was also the first female Minister of Transportation, and the first woman to be appointed to the board of Shell Petroleum Development Company Nigeria. On 27 November 2014, she was elected as the first female President of OPEC.

In April 2010, President Goodluck Jonathan signed the Nigerian Content Act, which aimed to increase the percentage of petroleum industry contracts awarded to indigenous Nigerian businesses – a reaction to the domination of the sector by foreign operators.

In October 2009, the Senate of Nigeria indicted Diezani Alison-Madueke and recommended prosecution for the transfer of 1.2 billion naira into the private account of a toll company without due process and in breach of concession agreement.

In September 2008 there was an unsuccessful attempt to kidnap Alison-Madueke at her house in Abuja with her son Chimezie Madueke.

Diezani Alison-Madueke has held three significant positions in the Nigerian federal government. She was appointed Transportation Minister in July 2007. On 23 December 2008, she became the Minister of Mines and Steel Development. When Vice-President; Goodluck Jonathan became acting President in February 2010, he dissolved the cabinet on 17 March 2010, and swore in a new cabinet on 6 April 2010 with Alison-Madueke as Minister for Petroleum Resources.

Since 1999 she has been married to Admiral Allison Madueke (retired), one-time Chief of Naval Staff who was at various times governor of Imo and Anambra State. She has two sons, Chimezie Madueke and Ugonna Madueke. In September 2011 Alison-Madueke was awarded an honorary Doctorate degree in Management Sciences by the Nigerian Defence Academy, Kaduna.

Diezani K. Agama was born in Port Harcourt, Rivers State, Nigeria. Her father was Chief Frederick Abiye Agama. She studied Architecture in England and then at Howard University in the United States. She graduated from Howard with a bachelor's degree on 8 December 1992. She returned to Nigeria and joined Shell Petroleum Development Corporation that year. In 2002, she attended Cambridge Judge Business School for her MBA degree. After returning to Nigeria, Diezani Alison-Madueke was appointed as an Executive Director in Shell in 2006. She was the first woman ever to be appointed by Shell as an Executive Director in Nigeria

Diezani K. Alison-Madueke (born 6 December 1960) is a Nigerian politician and the first female President of OPEC. She was elected at the 166th OPEC Ordinary meeting in Vienna on 27 November 2014. She became Nigeria's minister of transportation on 26 July 2007. She was moved to Mines and Steel Development in 2008, and in April 2010 was appointed Minister of Petroleum Resources.