(CNN) – Secretary of State Hillary Clinton will testify on last year's U.S Consulate attack in Libya before the Senate Foreign Relations committee on January 23, the same day she'll appear before the House Foreign Affairs Committee, the Senate committee announced Thursday.
Presided by Sen. Robert Menendez, D-New Jersey, the hearing will start at 9 a.m. ET.
Clinton was scheduled to appear on Capitol Hill in December but postponed her testimony while being treated for illness, a concussion and a blood clot near her brain. The country's top diplomat returned to work last week.
Four State Department officials were disciplined last month after an independent review of the September 11, 2012 attack revealed "systemic failures and leadership and management deficiencies" at the State Department. The violence left four Americans dead, including the U.S. ambassador.
After the report, one official resigned, while three others were placed on administrative leave and relieved of their duties, said State Department spokeswoman Victoria Nuland.
Clinton likely will face questions about the State Department's handling of security for diplomatic personnel.
The committee last held a hearing about the attack on December 20, with Deputy Secretary of State Thomas Nides and Deputy Secretary of State William Burns.
– CNN Foreign Affairs Reporter Elise Labott contributed to this report.