Gill is a Senior Fellow with ASPI's Northern Australia Strategic Policy Centre where her focus is on modern nation building, resilience and security. From February 2020 to January 2023 she was the Deputy Director of ASPI's Professional Development Centre. In 2022 Gill co-edited ASPI's Counterterrorism Yearbook 2022 and has authored a range of pieces for ASPI including articles and Special Reports. Gill has extensive senior executive experience in government policy, programs and transformation, and has worked a across a broad range of areas including national security and border security. She led the Australian Government’s biometrics for border control program which included design and implementation of SmartGate in Australia and New Zealand, and redesign of air passenger analysis.

She is a Fellow and Board Director of the Australian Risk Policy Institute and has held board positions in the government, not for profit and private sectors including as an independent member of the National Archives of Australia Executive Board, an appointed director (and Chair, Finance Audit and Risk Management Committee) for a national sporting organisation and was a former member of the Australian Institute of Professional Intelligence Officers board. Gill is a current member of the UTS Faculty of Arts and Social Sciences Industry Advisory Board.

She has a strong interest in gendered and family violence and the relationship with extremism and disenfranchised sectors of the community. Gill is a previous UN Women Empowerment Champion and has held the roles of Disability Champion, Indigenous Champion and Defence Reserves Champion.

Gill is a graduate member of the Australian Institute of Company Directors, an Executive Fellow of the Australian and New Zealand School of Government, and holds an MBA in International Business.