Greg Moriarty

Greg Moriarty combined defence and diplomatic work before becoming ambassador to the United States in 2026. He served with United States Central Command during Operations Desert Shield and Desert Storm, became a senior negotiator with the Bougainville Peace Monitoring Group, and later led Australia's embassies in Iran and Indonesia. ^{1, 2}

Moriarty held senior positions in the prime minister's office and served as Australia's counterterrorism coordinator. He served as secretary of Defence from 2017 to 2026. ¹

At the start of his Washington posting, Moriarty identified trade restrictions and AUKUS implementation as immediate concerns. In a June 2026 interview, he described working on Australia's response to proposed American tariffs and engaging the administration and defence industry over submarine production and Australian investment in the American industrial base. ²