A former U.S. congressional aide linked to disgraced lobbyist Jack Abramoff has pleaded guilty to a charge of conspiracy in federal court.

Mark Zachares appeared in federal court Tuesday, acknowledging that he conspired with Abramoff to get a job with an Alaska congressman so that he could gather information and contacts for Abramoff's lobbying firm.

Zachares also admitted accepting some $30,000 worth of tickets to sporting events and to accompanying Abramoff on a luxury golfing trip to Scotland.

As part of a plea bargain agreement, Zachares has agreed to help with the ongoing investigation of the Abramoff scandal. He is the 11th person linked to the affair to plead guilty.

Abramoff is serving a federal prison sentence of nearly six years, after pleading guilty last year to corruption charges involving key Republican politicians.