Dr Ruiz trained in paediatric respiratory medicine in London and Birmingham was appointed consultant in 1994 at King’s College Hospital. He has been a senior member of the cystic fibrosis network with a major commitment to outreach work in the southeast region which has included regular joint CF clinics in hospitals in Kent and East Sussex. He was head of Paediatric Respiratory Medicine at King’s from 2010 to 2021. He has wide interests in all aspects of respiratory disease in children, but particularly lung infection, including tuberculosis and mycobacterial disease in cystic fibrosis and was the BPRS representative on the BTS tuberculosis SAG.

He is also a member of the ERS and ECFS, is the PI for King’s at the ECFS-CTN, is on the CTAP Research Scientific & Oversight Board and was a Trustee of the BLF.