A time line of Douglas Partners' evolution
| 1954 | Frankipile Aust starts geotech drilling |
| 1960 | First full-time staff (Don Douglas) & Sydney laboratory built |
| 1963 | Ground Test Australia starts as trading division of Frankipile |
| 1964 | Brisbane office opens |
| 1971 | Ground Test Pty Ltd incorporated as separate company |
| 1976 | Townsville office commences |
| 1980 | Newcastle office starts initially as part time only |
| 1983 | D.J. Douglas Partners Pty Ltd formed to buy Ground Test |
| 1983 | Douglas Partners acquires Soil Mechanics Ltd’s Newcastle operation |
| 1989 | Douglas Partners acquires SoilMech P/L in Melbourne |
| 1990 | Douglas Partners opens an office on the Central Coast |
| 1990 | Cairns office commences operations |
| 1994 | Perth office opens its doors to Western Australia |
| 1994 | Douglas Partners opens Campbelltown office, now relocated to Macarthur |
| 1995 | Darwin Office commences |
| 1995 | Wollongong office opens its doors |
| 1998 | Gold Coast office is opened |
| 2006 | Douglas Partners expands to the Sunshine Coast |
| 2015 | Douglas Partners acquires Chandler Morrison Geotechnical in Coffs Harbour and Port Macquarie, forming Douglas CMG |
| 2018 | North West Sydney office is opened |
| 2019 | Douglas Partners expands into Ballina, NSW |
“DP is in a very strong position, as evidenced by its continued growth and recognition from its clients in the BRW Awards. The focus going forward will be to stick to what we do best, and that is providing integrated practical solutions to clients across a range of geotechnical, environmental and groundwater projects, with a further emphasis on providing efficient, timely and cost effective services.”