Lesley works as a Paediatric Asthma/Allergy Nurse Specialist in the Northern Health and Social Care Trust (NHSCT), prior to this she was employed in a similar role at the Royal Belfast Hospital for Sick Children (RBHSC). In 1992, she was the first N. Ireland hospital based paediatric asthma nurse.
Lesley set up the Adolescent Asthma Service in the RBHSC and carried forward the Safe Asthma Discharge Pathway, winning awards at the Ulster Paediatric Society and Irish Thoracic Society. In the RBHSC Lesley was also part of the Difficult to Control Asthma team working at Tertiary Level. In the NHSCT, she is employed to set up and run the nurse led Asthma and Allergy clinics as part of the Safe Asthma Discharge Pathway, also adolescent clinics for both asthma and allergy. Lesley sits on the committee of the National Paediatric Respiratory and Allergy Nurses Group (NPRANG). Regionally she is involved with the Northern Ireland Paediatric Respiratory and Allergy Network Group (NIPRANG).
Within education, Lesley is a Visiting Lecturer at QUB; she is also regularly involved teaching medical and nursing students and has spoken at regional and national conferences.