Atlas of Living Australia shows Acacia genistifolia is rare south of the Molonglo River though there is a sighting for Mugga Mugga which I have never seen. Acacia ulicifolia is more common but many of the sightings are from Canberra Nature Map!
There have been a number of other sightings of A. ulicifolia and this is the one for A. genistifolia. However, as it is in an area where some plantings were done a couple of years ago, it could be OK.