Many people have contributed to the designs and methods.  Here are some.

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Euan Tovey has been a medical researcher for over 40 years. Over this time he has worked in areas of biochemistry, allergy, asthma, epidemiology and viruses. He has led a research group at the University of Sydney / Woolcock Institute in Sydney, and worked in the UK and USA. He retired (theoretically) in 2014. ​His main interest now is writing novels about climate change. His current email address can be found here. 
Nick  Karlovasitis is an industrial designer who holds a variety of lecturing and consulting positions. He is Co-Founder of DesignByThem in Sydney (link) and has won multiple awards for his domestic designs. He has collaborated with Euan for over 10 years on the design and prototyping of various protective masks, nasal filters and air samplers. 

Many others have contributed to the development and application of methods. These include:  Tim O'Meara for his work on the halogen assay, Brett Green for his improvements to fungal detection methods, Jason Sercombe, Damien Liu-Brennan and Daniel Crisafulli for their excellence in the application, development and use of a range of air sampling and analytical methods over the years, Sacha Stelzer-Braid  for her work on virus assays and William (Bill) Lindsley for advice on air sampler design.

​Research and development is always a team effort.