Michael Kopper, the former head of Enron's global finance division, is expected to plead guilty to single charges of conspiracy to commit wire fraud and money laundering, according to two sources close to the investigation.

He will be the first executive at the company to admit wrongdoing in the case.

Kopper worked under former chief financial officer Andrew Fastow, and was involved in the controversial off-balance sheet partnerships used to shield much of Enron's debt.

He will enter his plea to a federal court in Houston today. It is unknown whether the deal will keep him from serving any jail time.