- Lead Antimicrobial Pharmacist, The Queen Elizabeth Hospital Kings Lynn NHS FT, Norfolk
- Antimicrobial Prescribing Specialist Practitioner, HCAI and Cleanliness Division, Department of Health, London, UK
- National Medicines Audit and Policy Pharmacist, Department of Health, Valletta, Malta
- Clinical Pharmacist, St Luke`s Hospital, G`Mangia, Malta
- Medicines Information & Pharmacovigilance Pharmacist, Govt. Pharmaceutical Services, G`Mangia, Malta
- Pharmacy Management Development Officer for the East of England
- Locum Lecturer/Associate Tutor, University of East Anglia, Norwich
In April 2011, Dr Micallef was appointed a PMDO for the East of England, where she works with other colleagues to promote Pharmacy Management initiatives in the UK.
- Clinical and Academic Reviewer
Dr Micallef acts as an invited reviewer for several healthcare journals.