Johnjoe McFadden was born in Donegal, Ireland.
Glenveagh National Park in Donegal
but brought up in the UK. He obtained his PhD at Imperial College London and went on to work on human genetic diseases and then infectious diseases, at the University of Surrey in Guildford, UK. For more than a decade, Professor McFadden has specialised in examining the genetics of microbes such as the agents of tuberculosis and meningitis. He has published more than 100 articles in scientific journals on subjects as wide-ranging as bacterial genetics, tuberculosis, idiopathic diseases and computer modelling of evolution and has edited a book on the genetics of mycobacteria. He has lectured extensively in the UK, Europe, the USA and Japan and his work has been featured in radio, television and national newspaper articles. His present post is Professor of Molecular Genetics at the University of Surrey. He lives in London and is married with a young son.

Writing
Professor McFadden wrote the popular science book, Quantum Evolution, published in the UK by HarperCollins in 2001, in the US by Norton in 2002 and currently being translated for publication by Kyoritsu Shuppan in Japan in 2003. The book examines the role of quantum mechanics in life, evolution and consciousness.

Professor McFadden also writes articles regularly for the Guardian newspaper in the UK on topics as varied as quantum mechanics, evolution and genetically modified crops. He has also reviewed books for the Guardian. The Washington Post and Frankfurter Allgemeine Sonntagszeitung have also published articles written by Professor McFadden.