Also on the expert panel is Mal Wauchope, a former Western Australian public servant who was WA Public Sector Commissioner until he stepped down in March.

So too is Mick Keelty, former Australian Federal Police commissioner from 2001 to 2009, Attorney-General Christian Porter announced on Tuesday.

"The unique experiences of these three individuals across criminal law and prosecution, public sector administration and law enforcement will assist the government to ensure that the model for the CIC is effective, appropriate and balanced," Mr Porter said.

The new body will be split into two parts - one investigating corruption in law enforcement, and the other investigating the public sector.

The current Australian Commission for Law Enforcement Integrity will handle the enforcement division, and be given more responsibility to investigate bodies like the tax office.

The public sector integrity division will investigate government departments, parliamentarians and their staff, the staff of federal judicial officers, and in some circumstances organisations that get federal money.

Public consultation is under way.

The expert panel will work with stakeholders on draft laws before a proposal is put to cabinet.

AAP