After completing his studies at the Faculty of Architecture of the Lviv Technical Academy on July 9, 1898, he graduated with honors, recognized as “particularly gifted.” In 1900–1901, he continued his specialization at the Polytechnic School in Charlottenburg. He actively collaborated with Ivan Levynskyi’s construction company, working on projects of various scales. Additionally, he developed architectural designs for the firms of Michał Ulam and Zygmunt Kędzierski.
From 1897 to 1905, he served as an assistant at the Department of Structural Engineering, and from 1906 to 1908, he worked as a designer at the Department of Continental Construction. In 1908, he defended his scientific work, “The Genesis of Wooden Construction in Poland.” The following year, he was appointed as a lecturer in technical drawing and wooden construction. In October 1910, he became a professor and head of the Department of General Construction. From 1926 to 1931, he also taught courses on building materials, cost estimation, and construction management.
He held leadership positions at Lviv Polytechnic: in 1912–1913, he was the dean of the Faculty of Continental and Water Construction, in 1915–1916 and 1920–1921, he headed the Faculty of Architecture, and in the 1916–1917 academic year, he served as the rector of the Polytechnic School.
Since 1899, he had been a member of the Polytechnic Society in Lviv, actively participating in the editorial work of the journal Czasopismo Techniczne, which regularly published issues dedicated to architecture. In 1908, he became one of the founders of the “Circle of Polish Architects in Lviv” and was elected to its board. He was also a member of the commission for the restoration of royal castles in Warsaw and Kraków. For his contributions to architecture, he was awarded the Commander’s Cross of the Order of Polonia Restituta.
He had a deep interest in traditional folk architecture in Galicia. His graphic works depicting wooden architecture were exhibited at the Czapski Palace in Kraków (April 13 – May 15, 1905), and in 1910, he presented photographs of folk wooden architecture at an architectural exhibition in Lviv in a dedicated personal hall.
Throughout his career, Tadeusz Obmiński left behind a significant architectural legacy. As a student of Ivan Levynskyi, he actively promoted the Art Nouveau style in Galician architecture and contributed to the establishment of Ukrainian folk stylistics in ecclesiastical art.