Zenger studied mainly mathematics with Wilhelm Matzek (1798–1891) and Josef Ladislav Jandera (1776–1957), astronomy with Karel Kreil and, after leaving for Vienna in 1851, with Joseph Georg Böhm (1807–1868).

[4] In the summer semester of 1850/51 he attended Jan Evangelista Purkyně's lectures entitled “Cosmology”, which aroused in him a great interest in astronomical questions, so that he began to participate in the work at the Clementinum Observatory under Böhm's direction.

From 1853 to 1861 he worked at the state Catholic grammar school in Banská Bystrica, and as he accepted a Hungarian scholarship during his studies, he was obliged to teach in what was then Hungary for at least six years after graduation.

[3] There, in February 1862, he received a decree transferring him to Prague, where at the end of the summer semester of 1862 he became the first private associate professor of physics at the State Polytechnic for teaching Czech and German.

His efforts in this direction continued and he succeeded in obtaining permission from the Viennese Ministry of Education to establish a separate chair of electrical engineering at the Czech Technical University from the school year 1891/92, which was headed by Karel Domalíp (1846–1909).

[3] His students included, for example, František Křižík[8] and Milan Rastislav Štefánik, who, on Zenger's advice, transferred from his studies in civil engineering to the Faculty of Philosophy.

[9] Before his death, Zenger bequeathed his library, his astronomical instruments and his entire fortune to the university for the benefit of a student foundation.

Visitors to the General Land Centennial Exhibition in 1891 were able to see for themselves Zenger's versatility, where he presented 35 original instruments and 240 scientific publications.

The estate consists of Zenger's scientific and private correspondence; his patent, legal and commercial documents; photographs and notebooks.