The lots are part of Thames’s regulatory AMP7 capital spending framework and Galliford Try anticipates they will be jointly worth up to GBP60m per annum.
For Lot 3, the FTSE250 group will work on Thames Water’s above-ground facilities, including clean and wastewater treatment works, pumping stations and reservoirs, while Lot 6 includes below ground infrastructure including the clean water and sewerage networks across the South London region.
Galliford Try was awarded Lots 1 and 2 by Thames earlier this year.
Bill Hocking, Galliford Try’s chief executive, said he was delighted to have strengthened its relationship with the water utility.
The appointments were fundamental a strategy of focusing on long term frameworks and high-quality client relationships, with water one of identified key sectors, he said.