Istad is working with photography, video and installation. She has participated in several solo and group exhibitions in both Norway and abroad. She has exhibited at a.o. KUBE Art Museum, Henie Onstad Art Center, Oslo Art Center, and Landmark Bergen Art Hall. Istad has made a series of public, site-specific projects such as; several landscape projects at Henie Onstad Art Center, DeFence, Oslo and Traveling SUN, Norway, UK and Iceland. She has participated at the regional exhibitions and her works have been purchased by a.o. KUBE Art Museum, Prime Ministers Office and LUAG Collection, PA, USA. She has received her education from Westerdals School of Communication and Parsons School of Design in New York. Istad has received a series of project grants, artist stipends and support from the government of Norway. She is part of the artist group Open Space.