The Crime and Corruption Commission has charged a close adviser to Ipswich mayors Paul Pisasale and Andrew Antoniolli with misconduct.

The body on Tuesday charged Ben Hayward, senior adviser, executive secretariat, with one count of misconduct in public office.

Ben Hayward was a close adviser to both Andrew Antoniolli and Paul Pisasale. Credit:AAP

It takes the number of elected and other officials and related people charged as part of the CCC's investigations into the beleaguered Ipswich City Council to 12, including two mayors and two chief executives, with a range of offences dating back to at least 2011.

The state government last week issued a 21-day show cause notice to the entire council asking why it should not be sacked and replaced with government-appointed administrators.