ADELAIDE defender Courtney Cramey is an unsung hero on and off the field.

Cramey, a social worker for the South Australian correctional services department, will marshall the Crows' backline when they chase their fourth straight win in the NAB AFL Women's competition against Fremantle at Fremantle Oval on Sunday.

When she's not making tackles or shutting down opposition forwards, Cramey is doing her part to make the community a safer place.

"As a social worker, I am working with people who have been in prison and returning to parole, or people [who] come from the courts on a community-based order, and making sure they are rehabilitated and reintegrated back into the community," Cramey told AFL.com.au.

"Ultimately, it's about preventing further crimes being committed and making sure there are no further victims in the community.

"Footy is a release and work is a good thing that keeps me grounded."

Cramey, a priority selection for the Crows, has been playing in the SAWFL since 2004 with Morphettville Park and has captained the South Australian representative team since 2011.

The biggest transition for the 31-year-old has been moving from the midfield to defence.

"I'm really enjoying my role in the backline," Cramey said.

"Having the support around me of Heather Anderson and Talia Radan is great. It's amazing to work with them in defence.

"They are captains in their own right of their respective club teams (Anderson for the Waratah Wanderers in the NTFL and Radan for the Belconnen Magpies in the AFL Canberra competition).

Cramey was a tower of strength for the Crows in last weekend's thrilling three-point win against Carlton at Thebarton Oval, picking up eight possessions to go with seven tackles and four marks.

"Courtney is a player I don't think gets the attention and respect she deserves," Adelaide coach Bec Goddard said.

"She's not flashy, she just goes back and does her role.

"She's the general down back. She's used to being a midfielder in South Australian footy, so she's had to change the way she prepares and the way she measures her performance each week.

"She's doing such a great job."

The Crows have conceded just five goals in three games and, along with the Brisbane Lions, are unbeaten after three rounds.