The sites in Kent will use tunnelling spoil from the Crossrail project to create a development platform for thousands of homes and new commercial and leisure space.
Site preparation work is expected to be completed by 2012 at Northfleet Embankment and Queenborough and Rushenden in Kent.
Hydrock has won the contract to provide engineering services to the South East England Development Agency (SEEDA) which is backing the schemes in partnership with Gravesham Borough Council, Swale Borough Council, Kent Thameside Regeneration Partnership and the Homes & Communities Agency (HCA).
The 19 hectare Northfleet site is located 2 km west of Gravesham on the southern bank of the River Thames. Previous land uses include a former power station, major cable and electronics factories and other smaller scale industries.
South of Queenborough harbour on the Isle of Sheppey, the 12 hectare Queenborough and Rushenden site has been historically used for ceramics factories, glassworks and railway and transport depots.
The Hydrock team will be providing geotechnical/geo-environmental ground investigation services, planning services, infrastructure review and the land raising and remediation strategy.
Dr Mike Higgins, Hydrock Director, said: “We will be fast-tracking the site investigations by carrying them out at the same time as demolition at the Northfleet site to expedite the programme.”