He was born the son of the scythe dealer Franz Xaver Redtenbacher (1804–1871) and Theresia Redtenbacher née Lampl (1823–1883) in the wealthy market town of Kirchdorf an der Krems in what was then the Austrian Empire.
This activity resulted in a collaboration with the entomologists Ludwig Ganglbauer, Friedrich Moritz Brauer and especially with Carl Brunner von Wattenwyl.
His achievements as an entomologist include, in particular, the creation of a "Monograph of the Conocephalinae" (German original: "Monographie der Conocephaliden"), the research of the Orthoptera and earwigs of Austria-Hungary and Germany, whose identification tables form the basis of all later work on the orders processed here Central and Southeastern Europe formed.
In addition, he published some smaller studies on the larvae of Myrmeleontidae (antlions) and other works on grasshoppers, of which he described 223 species and 53 genera that are still valid today.
In addition, the name of the subspecies Bacillus rossius redtenbacheri Padewieth, 1899 is dedicated to him.