Johann Kellerer, born in 1955, graduated as a civil engineer, with a few additional semesters in philosophy and management.
In the Bundeswehr (German army), he held the rank of Drill Sergeant before assuming responsibility for nonprofit organizations for over fifteen years.
The 1980s saw him as an activist for organic foods and healthy lifestyles, and the 1990s as a developer of renewable energy projects.
From 2003 to 2020, he was the managing partner of a group of companies which are active in steel and plant construction as well as in environmentally friendly energy solutions.
In 2017, he founded the UK nonprofit association, Perfume.info, to provide information on the dangers of fragrances; set up the website www.perfume.info and, last but not least, translated, published and promoted his book, “Perfume, The Hidden Bane of Your Health” into all the major languages of the world