The Canberra Liberals will today elect a new party leader.
A party meeting will be held around midday where both leader and deputy leader positions will be spilled.
Mr Seselja says he will not be anointing a successor.
"This is a party room decision and each of the eight members of party room gets a vote, they're not going to be dictated to by me," he said.
Mr Seselja says either would make a good opposition leader.
"I think we'll have great leadership in the liberal party once I step down," he said.
Transport spokesman Alistair Coe is considered the most likely contender for the deputy position.