 In 1954, Josland resigned from the Wallaceville Animal Research Centre to become chief bacteriologist at the National Health Institute, Department of Health, in Wellington.The Institute carried out research and teaching, and provided specialised epidemiological and laboratory services in general bacteriology, bacteriophage typing, chemistry and virology.Josland continued to specialize in research into Leptospirosis and Salmonella, working firstly under Dr James Blakelock, and later under Dr James Manning (scientist).