A seasoned diplomat, Roberts previously served as Deputy Head of Mission at the Australian Embassy in Tokyo and was Ambassador to Timor-Leste from 2018 to 2022.
By combining the strengths, networks, and resources of both organisations, the agreement is set to offer practical benefits to businesses across both countries.
Mr Carroll confirmed the resignations on Thursday and said Labor MPs would meet on Monday morning to elect new ministers before he announced his reshaped cabinet.
“This recognition celebrates not only his remarkable body of work but also his immense contribution to storytelling that resonates with audiences across the world."