The most senior official in the Department of Justice will answer questions on the recent scandals.
Departmental e-mails about the legal strategy deployed against whistleblower Maurice McCabe brought about the resignation of Frances Fitzgerald as Tánaiste last week.
In her opening statement, the acting secretary-general of the Department of Justice will acknowledge that mistakes have been made.
However she sets out a defence of their work, saying there are hundreds of people doing good work under difficult circumstances.
Oonagh McPhillips will say the department has full complied with all discovery orders from the Disclosures Tribunal.
That is despite the news that e-mails sent to Ms Fitzgerald and her advisors about the legal strategy to discredit Mr McCabe were not handed over to the tribunal.
Deputy Fitzgerald insists she did nothing wrong, and the statement due to be made to the Justice Committee seems to back that up - saying the department's advice would always be that a minister should not be involved in any case before a Commission of Investigation.