Josef "Sepp" Holzer (born July 24, 1942 in Ramingstein, State of Salzburg, Austria) is a farmer, an author, and an international consultant for natural agriculture. After an upbringing in a traditional Catholic rural family, he took over his parents' mountain farm business in 1962 and pioneered the use of ecological farming, or permaculture, techniques at high altitudes (1,100 to 1,500 meters (3,600 to 4,900 ft) after being unsuccessful with regular farming methods.
Holzer was called the "rebel farmer" because he persisted, despite being fined and even threatened with prison for practices such as not pruning his fruit trees.
As of 2010, he was still conducting permaculture ("Holzer Permaculture") seminars both at his Krameterhof farm and worldwide, while continuing to work on his alpine farm.
He is author of several books, works nationally as permaculture-activist in the established agricultural industry, and works internationally as adviser for ecological agriculture.
He is the subject of the film The Agricultural Rebel, directed by Bertram Verhaag.