After graduating from West Dean Stefka was awarded a 1-yr Icon/HLF Internship at The Victoria and Albert Museum Ceramics Department where she worked on wide variety of ceramic materials for major projects. Her early work included conservation work at The British Museum focused on a wide range of archaeological and historical examples of ceramics, glass and enamels.
From 2009 to 2011 Stefka began work on the major redevelopment Royal Museum Project at the National Museum of Scotland. She had particular responsibility as Lead Conservator for the new Artistic Legacies gallery.
Stefka has also worked at the Sainsbury Centre for the Visual Arts (2011-2013) where she worked as conservator for major redevelopment projects which entailed decant and re-display of more than 1000 objects drawn from collections of Modern Art and the reserve collection of World Arts, as well as the creation of new gallery spaces. Her responsibilities included formulating and advising solutions for the conservation, display, mounting of objects and case specifications. She was also responsible for devising and implementing a preventive conservation programme for the long-term care of the gallery collections.
In 2014 Stefka worked on the Earthquake Recovery Project as a Conservator at the Canterbury Museum in Christchurch, New Zealand where she was responsible for the conservation of composite material artefacts from the Ethnographic and Antarctica Heritage Trust collections damaged during the earthquakes in Christchurch 2011.
Canterbury Museum, Christchurch, New Zealand: conservation work on over 500 objects ethnographic, decorative arts, social history and natural sciences and Antarctica Heritage Trust objects (including wood carved ritual Maori and Aboriginal masks, weapons, sculpture and Fijian vessels; stone weapons, bone artefacts, variety of ceramic objects, mantle clocks, 19th century spinning wheel, sledge meter parts). Collaborative work with collection management teams, exhibition technicians and curators to improve the seismic resistance of objects in stores and on display.
National Museum of Scotland (NMS): Conservation work which included interdisciplinary conservation work and installation support. She was responsible for the assessment and treatment of a wide range of artefacts including Egyptian artefacts, Benin bronzes and ivories, Zanzibar silverwork, Chinese enameled metalwork, Japanese sword guards, Tibetan copper and wooden objects, Japanese and Chinese lacquer artefacts, glass, Nasca, Italian and Classical Greek pottery and contemporary ceramics, as well as rock and fossil formations.
Sainsbury Centre for Visual Arts, University of East Anglia, Norwich: Conservation work in collaboration with the Sainsbury Research Unit for the Arts of Africa, Oceania and the Americas, related to Crossroad of Empires archaeological project. Work included the identification, reconstruction and conservation of archaeological ceramics from Northern Benin.