Marzia joined LSHTM in 2022. She is a paediatrician and epidemiologist by background, with clinical and research experience in maternal, newborn child health in over 40 countries, particularly in Europe, Central Asia, Africa, South East Asia, and Latin America. 

She has been collaborating closely with WHO since 1996, and has been directing a WHO Collaborating Centre for Maternal and Child Health, based in Trieste Italy, since 2012. She is currently a member of several WHO/UNICEF official boards - in particular related to maternal, newborn, child and adolescent quality of care and metrics.

She is author of about 200 peer-reviewed scientific publications, academic editor of scientific journals, invited external referee for several scientific journals and funding bodies including the Wellcome Trust and the EU Commission.

For WHO she has contributed so far to over 40 products - including WHO Standards for improving quality of care, WHO tools to assess and improve the quality of care, WHO manuals, WHO training packages, and WHO guidelines -.