Eyre Peninsula national parks will get two new park rangers as part of a statewide increase in rangers to boost numbers and provide better services for park visitors.
One of the new rangers will be based in Port Lincoln and support the Coffin Bay and Lincoln national parks.
The other, based in Ceduna, will cover the Nullarbor National Park and the Great Australian Bight Marine Park.
Environment and Water Minister David Speirs said more than 320 applications were received after the state put out the call in April and May this year.
"This recruitment brings South Australia's total park rangers to 103 and marks a major milestone for the government's More Park Ranger election commitment," he said.
"Our government committed last year to increase the total number of park rangers by 20 by 2021 - a boost of more than 20 per cent.
"Park rangers are at the forefront of conservation in South Australia and these new park rangers are about putting more people on the ground managing parks, supporting visitor experiences and caring for wildlife.
"We want to increase the number of people who can experience these places and make South Australia a nature-based tourism destination.
"By investing more money in our parks we will make these natural beauties more accessible for everyday South Australians and tourists alike."
The commitment will also include the development of a new volunteer park ranger program as establishing better career pathways for Aboriginal rangers by 2021.
The rangers will begin duty later this year.