Fred Hansen, the general manager of Portland's public transport provider, will take up his position in October.

Premier Mike Rann said on Tuesday, the appointment was timely considering the state government's plan to spend $2 billion on transport infrastructure and further funding announced in the federal budget.

"Mr Hansen's home town of Portland is internationally recognised as one of the finest exponents of a sustainable and integrated public transport system," Mr Rann said.

"We have taken our lead from Portland and Mr Hansen in developing our plans for the coast-to-coast rail system which is now taking shape."

Mr Rann said Mr Hansen was a world leader in the field of public transport and integrated land use and renowned for his innovative approach to the provision of public transport.

After recently running the sustainability operations of the American Public Transportation Association, Mr Hansen would help SA maximise the potential of its investment in public transport.

"In particular we are looking to benefit from Mr Hansen's expertise in the provision of higher density development along transport corridors as we pursue a more liveable and sustainable city," the premier said.