time staff working with materials technology within the main hubs of Aberdeen , London , Norway , Houston , Columbus , Calgary , Rio and Singapore .
O O B-SKILL I-SKILL I-SKILL I-SKILL O O O O O O O O O O O O O O O O O O O O O
NN NN VBG IN NNS NN IN DT JJ NN IN NNP , NNP , NNP , NNP , NNP , NNP , NNP CC NNP .