Josie 04.6 Josie Clare Mainwari

Josie Mainwaring

Research Scientist

Biotechnologies

Exploring the immense potential of the microbial world

I'm a Research Scientist in the Biotechnology group, specializing in Bioprocessing and Fermentation. Broadly, I am interested in using precision and biomass fermentation to harness microbes and microbial enzymes, compounds, and processes for the valorization of waste streams and the production of animal-free food ingredients, sustainable biofuels, biological control tools, and biopharmaceuticals.

Prior to joining Callaghan Innovation, I worked as a post-doctoral researcher and teaching fellow at Te Herenga Waka | Victoria University of Wellington (VUW). The majority of my research at VUW focused on developing biological tools to control the pathogen that causes Kauri Dieback disease in Aotearoa. This involved studying the carbohydrate composition of the pathogen's cell wall, biodiscovery of carbohydrate-active enzymes (CAZymes) that might degrade this cell wall, and exploring the potential of these CAZymes (and of microorganisms that naturally produce them) as biological control tools for the management of Kauri Dieback disease.

I hope to continue to explore the vast biotechnological potential of the microbial world while helping to tackle some of our most imminent challenges relating to sustainability, food security, and human health.

Areas of expertise
  • Isolation, identification, culturing, and manipulation of bacteria, fungi, and oomycetes
  • Bench-scale fermentation of bacteria and fungi
  • Bioinformatic mining of microbial genomes
  • Protein expression and purification
  • Enzyme activity and antimicrobial assays
Education

PhD, Molecular Microbiology, Victoria University of Wellington, 2024

Selected publications

Mainwaring, J. C., Vickers, C. J., and Gerth, M. L. (2025). Cellulases from the seaweed-degrading bacterium Rhizobium sp. C1 and their potential for biological control of Phytophthora sp. Manuscript in preparation.


Mainwaring, J. C., Gerth, M. L, and Vickers, C. J. (2025). Draft genome sequence of a novel Vibrio species isolated from the marine macroalga Codium fragile (Oyster thief) and its associated CAZome. Microbial Resource Announcements.


Mainwaring, J. C., and Gerth, M. L. (2024). A draft genome sequence of Cellulomonas sp. ICMP 17802, isolated from root nodules of Vicia faba. Microbial Resource Announcements. https://doi.org/10.1128/mra.00899-24


Mainwaring, J. C., Vink, J. N. A., and Gerth, M. L. (2023). Plant pathogen management in a native forest ecosystem. Current Biology, 33(11), R500-R505. https://doi.org/10.1016/j.cub.2023.02.047

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