RDG wholly own geotechnical and chemical testing laboratories Terra Tek Limited strategically located around throughout the United Kingdom. This ensures total autonomy and control over timescales and procedures. UKAS Accreditation is held for all routine geotechnical soil and rock testing in laboratories and on-site testing at Aberdeen, Glasgow, London, Belfast and Birmingham, the latter of which is also UKAS and MCERTS Accredited for contamination testing.

Raeburn Drilling & Geotechnical Ltd is one of the largest and most prominent independent Site Investigation contractors in the U.K.