Reintroduction founding events underpin the genetic diversity, fitness, and long-term viability of translocated populations. Admixture is one strategy that can be used to maximise genetic variation but individual founders and reproductive skews in the first generation following translocation can result in bottlenecks and loss of genetic lineage. To test the effectiveness of admixture in populations of greater bilby (Macrotis lagotis) reintroduced to three predator-free safe havens, we measured genetic diversity, and conducted population structure and parentage analyses of founders and first-generation offspring. Bilbies were reintroduced to Mallee Cliffs National Park and two separate exclosures (Mingku, Thipa) in Sturt National Park as part of the Wild Deserts Project between 2019 and 2021. Two of the populations were established with founders with ancestry from two genetic clusters and both lineages were detected in first generation recruits. Despite this, reproductive skews were detected. Fewer than half of the male founders at all three sites sired young in the first 4-12 months post-release. One male reintroduced to Wild Deserts Thipa sired 67% (8/12) of the offspring and two reintroduced to Mallee Cliffs sired 47% (17/36) of the offspring combined. Wild Deserts Thipa was founded with males sourced from Arid Recovery and Thistle Island, but despite having the same genetic ancestry, only Arid Recovery males sired young. These skews indicate that supplementations may be required to limit genetic drift, inbreeding and loss of genetic lineage. Further analyses should be undertaken to determine if these skews persist beyond the first generation.