Major Maher has served in the Australian Army for 20 years and is taking leave in 2022 to complete a Doctorate examining Proxy Warfare. He has served with multiple deployments to both Afghanistan and Iraq and has been a military fellow and post-graduate lecturer with the University of New South Wales (UNSW), Canberra. He is also a visiting fellow with the Charles Sturt University Terrorism studies program, a non-resident fellow with the Modern War Institute at West Point, and lectures with David Kilcullen on Irregular Warfare and the Theory of Special Operations. In 2021, he was an Australian Chief of Army Scholar.