The j-c-k (Janser Castorina Katzenberger) architecture practice was founded in 2015 and is led by four architects Sandra Janser, Castorina Santiago, Ursula and Markus Katzenberger.
Sandra Janser was born in 1976 and is an architect from Graz University of Technology, az4 and ETS Seville. In 2004, she obtained her degree, which was awarded the Graz Architecture Prize. From 2004 to 2009, she collaborated with ppag architects, Vienna, and pac architects, Buenos Aires. In 2009, she passed the ZT exam and since 2010 has been an architect and member of the Chamber of Civil Engineers of Styria and Carinthia. Since 2019, she has been a member of the advisory board of the Styrian Education Authority and since 2023 a member of the advisory board of the Styrian Architectural Culture Association, serving as a jury member for the Chamber.
Santiago Castorina was born in 1978 in Argentina and graduated as an architect from UN Mar del Plata in 2003. In 2004, he collaborated on the "elemental" social housing project in Santiago, Chile. From 2005 to 2006, he completed a postgraduate master's degree at the UBA Buenos Aires. From 2007 to 2010, he collaborated with bus architektur in Vienna. From 2011 to 2013, he was a lecturer at the Institute of Architecture at Graz University of Technology.
Markus Katzenberger was born in Graz in 1976. He studied architecture at Graz University of Technology and Montpellier, graduating in 2003 and passing the ZT examination. He has been an architect and member of the Chamber of Civil Engineers of Styria and Carinthia since 2007. From 2009 to 2015, he was a lecturer at the Institute of Architectural Technology at Graz University of Technology.
Ursula Katzenberger was born in Graz in 1975. She studied architecture at Graz University of Technology and Montpellier, graduating in 2004.
The studio has achieved numerous successes in competitions and awards. In 2025, it won the Styrian Regional Architecture Award "AHS Reininghaus," in 2024 the first prize with "Wohnbau Fritz-Stachel-Gasse, Hartberg," in 2023 the award "Extension of the Regional Criminal Court and Public Prosecutor's Office in Graz," in 2020 the first prize with "New Construction AHS Reininghaus," in 2013 with "Wohnbau Gleisbach," in 2011 with "Stadtfinden" and with "Lyoness Tower," as well as the recognition award "Wohnbau Waagner-Biro-Straße" Graz and was a finalist in "Housing – This is tomorrow" in Spain. In 2010, it won first prize with "Pilot Project – Jakomini Neighbourhood" in Graz and "Schools for Doctors" in Argentina. It received the "Kärnter Holzpreis" recognition award for the Wolfsberg climbing centre in 2009. He received first prize for "Remodelling Microcentro de Rafaela" in Argentina in 2006 and for "Vivienda Social Elemental" in Santiago de Chile in 2004, when he received the "GAD Award" in Graz.
