Andrew Yakubu, the ex-group managing director of the Nigerian National Petroleum Corporation (NNPC), was charged with money laundering and fraud when he appeared in court in Abuja.
The charges relate to the discovery by the Economic and Financial Crimes Commission of USD 9.8 million (9.2 million euros) and 74,000 pounds (USD 91,000, 85,000 euros) in cash at a property in the northern city of Kaduna.
He was also charged with failing to make a "full disclosure" of his assets and for unlawfully transporting the cash to the city. He pleaded not guilty.
The charges against Yakubu, who ran the NNPC from 2012 to 2014 when Goodluck Jonathan was president, are the latest strike against senior figures in the oil sector.
More From This Section
Former oil minister Diezani Alison-Madueke was recently accused in a separate case of diverting more than USD 150 million from the NNPC, whose operations have long been considered opaque and corrupt.
President Muhammadu Buhari was elected two years ago vowing to stop the plunder of state funds by corrupt politicians and public officials in the country of 180 million people.