Our executive team is charged with the early development of GAFFI and additional members will join this start up team.

David W. Denning FRCP FRCPath FMedSci


Emma Orefuwa


Tim Moss


Jenny Bartholomew



David Denning is an internationally recognised clinician with expertise in fungal diseases. He manages the UK’s National Aspergillosis Centre in Manchester, the world’s only such centre. David Denning has published more than 500 papers, books and book chapters and lectures worldwide. His writings have been cited over 60,000 times and he has successfully lead many major international collaborative science, diagnostic and treatment projects and clinical guidelines, with subsequent publication in Nature, the New England Journal of Medicine and the Lancet. He is the Founder of two University spinout biotechnology companies – F2G Ltd (antifungal drug discovery and development) and Myconostica Ltd (molecular diagnostic tests for fungi).

David is Chairman of the Editorial Board of The Aspergillus Website (1998-) accessed by >100,000 computers per month and the educational LIFE website. He has chaired the Scientific Committees of several international fungal infection meetings and co-chairs the alternate year Advances Against Aspergillosis meetings, attracting ~400 delegates from >120 countries.

Dr Denning and family hold Founder shares in F2G Ltd, a University of Manchester spin-out antifungal discovery company. He acts or has recently acted as a consultant to Scynexis, Pulmatrix, Zambon, iCo Therapeutics, Roivant, Biosergen and Fujifilm. In the last 3 years, he has been paid for talks on behalf of Dynamiker, Hikma, Gilead, Merck, Mylan and Pfizer. He is a longstanding member of the Infectious Disease Society of America Aspergillosis Guidelines group, the European Society for Clinical Microbiology and Infectious Diseases Aspergillosis Guidelines group and the British Society for Medical Mycology Standards of Care committee.

David is Chief Executive of GAFFI, with responsibility for all functions and advocacy outside of Kenya. He is part time.


Emma Orefuwa brings with her 14 years of Public Health program management experience and has worked extensively in Africa, Asia and Europe. Her first degree was in Biochemical Sciences at the University of Salford in 2001. She then went on to study a Master of Science in the Biology and Control of Disease Vectors at the London School of Hygiene & Tropical Medicine (2002)  and subsequently, a Masters in Public Health from Kings College (University of London) in 2009.

She has held a number of high profile project and programme management roles within the UK National health service, International Development, and Global Health sectors. Her most recent apointment was as Strategic Operations Consultant and Programme Manager for Connecting Organisations for Regional Disease Surveillance (CORDS) France, a network of regional disease surveillance networks networks to improve global capacity to respond to infectious diseases.

Emma has extensive experience managing multi-country Maternal, Newborn and Child Health programmes for the African Medical Research Foundation (AMREF Health Africa, UK) and has led the implementation of Diaspora development programmes at the African Foundation for Development (AFFORD). Her research has spanned her diverse range of interests; from carrying out susceptibility studies of the mosquito vector Culex quinquefasciatus to local strains of the Lymphatic filariasis  parasite Wuchereria bancrofti in Nigeria, to seeking to gain a deeper understanding of ways in which to engage young African diaspora in the development of Africa.

As a second generation African diasporan of Nigerian and Seychellois descent, Emma has a passion for supporting Africans to act as agents of change, and for facilitating African solutions to African problems. It was during her time working as a co-organiser for the European Mosquito Research Association annual conference in 2009, that she decided with fellow African entomologists, to co-found the Pan African Mosquito Association (PAMCA), an African-led network of scientists and Public Health professionals dedicated to identifying unified approaches to fighting vector-borne disease across the African continent.

Emma is Chief Executive – Kenya, with responsibility for the FIP-Kenya diagnostic program.


Tim Moss is an accountant who oversees the finances and governance for GAFFI and GAFFi UK. Tim qualified as a chartered accountant with Pannell Kerr Forster in London in 1990 and has over 30 years experience having held senior financial positions with a number of private and public companies in financial services, utilities, food product development, communications and telecoms sectors. He has been based in Geneva, Switzerland, since May 2006.

He has wide ranging commercial experience, developing strategies, financial reporting, audit and corporate governance to meet statutory and stakeholder expectations. Considerable experience managing, developing and implementing processes designed for rapidly expanding enterprises including budgeting¸ cash flow and fund raising.


Jenny Bartholomew has been Senior Editor and Writer for the Aspergillus Web educational resources for the past 15 years. She previously worked in Oncology research at Christie’s Hospital, Manchester and on Rheumatoid arthritis at Manchester University and as Lecturer at Monash University, Melbourne.

Her expertise encompasses all aspects of fungal diseases working  within the University Hospital of South Manchester and also the National Aspergillosis Centre. Jenny launched the LIFE-worldwide website in 2012 and then GAFFI in 2013; she continues her role as communications director and  editor in chief for GAFFI as it continues to develop.