After 1945 she became director of the Museum of Natural History in Ljubljana and worked in the conservation service.[5] In particular, she made efforts to renew and protect the Juliana Alpine Botanical Garden and Triglav National Park.[6][7] She was inspired by the Italian conservationist Renzo Videsott.
In the 1960s she headed the Yugoslav delegation of the International Commission for the Protection of the Alps (CIPRA) and proposed a transnational nature park with Austria in the Savinja Alps and Karawanks. The bilateral park was, however, never realized.[8] Today, this area is part of the European Green Belt. She died in 1967 in Ljubljana.
In 2019, Piskernik was honoured with a commemorative stamp issued in Slovenia.[9]
^Tina Bahovec (2010): Engendering Borders: The Austro-Yugoslav Border Conflict Following the First World War, in: Agatha Schwartz (Ed.), Gender and Modernity in Central Europe: The Austro-Hungarian Monarchy and its Legacy, University of Ottawa Press, ISBN978-0-7766-0726-9, pp. 219–234.
^Maja Haderlap (2016): Angel of Oblivion (Translated from German by Tess Lewis), Archipelago Books, Brooklyn, New York
^Mateja Tominšek Perovšek (2012): Slovene Women in the Modern Era (Exhibition Catalogue), National Museum of Contemporary History, Ljubljana, pp. 63–64
^Carolin Firouzeh Roeder (2012), Slovenia's Triglav National Park: From Imperial Borderland to National Ethnoscape, in: Bernhard Gissibl, Sabine Höhler, Patrick Kupper (Eds.), Civilizing Nature: National Parks in Global Historical Perspective, Berghahn Books, New York and Oxford, ISBN978-0-85745-525-3, pp. 240–255.