President Obama on Thursday appointed Daniel Werfel, a senior Office of Management and Budget official, as the next acting commissioner of the Internal Revenue Service.

The announcement comes a day after Obama forced out Steven Miller, the former leader of an agency under fire for targeting conservative groups seeking tax-exempt status.

“Throughout his career working in both Democratic and Republican administrations, Danny has proven an effective leader who serves with professionalism, integrity and skill,” Obama said. “The American people deserve to have the utmost confidence and trust in their government, and as we work to get to the bottom of what happened and restore confidence in the IRS, Danny has the experience and management ability necessary to lead the agency at this important time.”

The White House did not say whether Werfel would be nominated to fill the post permanently. White House officials say Werfel would serve at least through the end of the fiscal year.

Werfel’s most recent post was controller of the OMB.

Earlier Thursday, Obama insisted he did not know about an inspector general’s report detailing the IRS’ targeting of conservative groups until last Friday. However, he did not rule out the possibility that somebody in the White House knew of misconduct by the IRS before White House lawyers were alerted to the activity on April 22.

The president also rejected calls for a special counsel to investigate the IRS.