Union boss Sheldon eyes NSW Senate seat

Transport Workers Union boss Tony Sheldon has quit his role to take a shot at becoming a NSW Labor senator.

Mr Sheldon has been replaced by Michael Kaine as the TWU national secretary after almost 30 years with the union, including nearly 12 years in the top job.

"As a senator I intend to bring the advocacy and activism from my time in the union movement to the policy level," Mr Sheldon said in a statement on Monday.