At Brisbane City Council's public transport committee meeting on Tuesday morning, Peter Matic echoed Lord Mayor Graham Quirk's previous assertions that the LNP administration does not support privatisation.

However, Cr Matic, like the Lord Mayor before him, stopped short of ruling out putting the network up for sale.

"The Lord Mayor has been asked on three separate occasions in the chamber about this and on each occasion he said he does not support privatisation," Cr Matic said.

"We are strongly committed to BCC as the provider of the service.

"The answer is simple, we will continue to maintain the network and we do not support privatisation as an organisation."

Under questioning from independent councillor Nicole Johnston, Cr Matic declined to comment on the circumstances of the departure of long-time Brisbane Transport head Alan Warren.

The council's civic cabinet opted not to renew Mr Warren's contract, which expires in November this year.

Mr Warren, widely credited with the on-time running of the city's fleet of 1200 buses, said in a memo to employees that civic cabinet had decided a "new dawn" was required in the operations of the network.

It has prompted speculation the council is moving towards the privatisation.

He is negotiating with council chief executive Colin Jensen about finishing within the next three to four weeks.

Cr Matic reiterated to Cr Johnston that the administration does not comment on the individual contracts of council officers.

Cr Johnston also asked why Cr Matic's revelation the city's bus contract had been extended until 2015 had not come before council for approval.