Holloway was awarded a Fulbright Scholarship in 1955 and as a result spent three years at the Harvard Biological Laboratory.[1] While there she completed a PhD in biology, which was awarded to her in 1959.[1] Upon returning to New Zealand, Holloway was appointed to the position of entomologist at the Dominion Museum. In 1962, Holloway moved to Nelson to join the entomology division of the Department of Scientific and Industrial Research.[3]
In 1963, Holloway married Guillermo Kuschel, a fellow entomologist.[4][5] From 1963 to 1973, Holloway undertook the full-time parenting of the couple's three children.[1]
In 1974, Holloway was employed to work on diptera at the systematics section of the Department of Scientific and Industrial Research in Auckland. In 1981, she again began researching Coleoptera and in particular researched Anthribidae for a scientific publication. In 1990, Holloway's services to New Zealand as a scientist were recognised when she was awarded the New Zealand Commemoration Medal. Although she retired in 1991, Holloway continued her research. In 2009, she was awarded the Fellowship of the Entomological Society of New Zealand recognising her outstanding contribution to entomology.[6]