An airtightness testing specialist based at the CSIRO campus in Yarralumla, working on whole-building airtightness, stairwell pressurisation testing, façade and curtain wall diagnostics and apartment-to-apartment sealing. Testing follows AS/NZS ISO 9972:2015 and is carried out by technicians certified by ATTMA, the Air Tightness Testing and Measurement Association, at Levels 2 and 3 — the credential that makes a pressurisation result defensible when a certifier questions it.