She forged her career in the Australian film industry, working firstly in film and television production, where she directed and produced projects for national broadcast, before expanding her professional engagement to include screen policy and education.

[6] She subsequently made numerous short films[7] including Surrender[8][9] which achieved theatrical release with AFI Distribution and received positive critical attention within Australia and at international film festivals.

Since obtaining her PhD in Media and Communications,[11][12] she has published extensively on screen policy[13][14][15] and delivered lectures at key international conferences and institutions including the US Society for Cinema and Media Studies (SCMS), the European Network for Cinema and Media Studies (NECS), King's College London[16] the British Institute in Paris, the University of Copenhagen,[17] and the Institut National d'Histoire de l'Art.

[18] Hammett-Jamart is known in particular for her research into policy implementation on international co-productions[19][20][21][22][23][24] and has held visiting fellowships at the Université Paris III (UFR Arts et Medias) and the University of London.

[26][27] She is a member of the Steering Committee of the Produire au Sud 'Scholar in Residence' program at the Festival des Trois Continents and teaches in the professional Masters program[28] at the Université Paris III, La Sorbonne Nouvelle.