The company will sample, analyse and advise on waste at nuclear sites owned by British Nuclear Group's Magnox business.
 
The three sites are: Bradwell in Essex, Trawsfynydd in North Wales and Hunterston A in Scotland.
 
Amec has already started work at the sites, conducting detailed sampling and analysis of radioactive sludges contained in silos and waste contaminated oils.
 
The contracts will run for approximately six months.
 
Dr Mike Smith, Amec manager of technology services said: "These are strategically very important contracts for us
 
"The unique skills within Amec's nuclear business mean we can undertake the full programme of work inhouse, from sampling radioactive waste on site, radiochemical characterisation in our laboratories, right through to trials to establish the most cost-effective waste encapsulation solutions. Competition for this work was fierce and we are delighted to have been successful."