In an interview with CNBC, Adecco CEO Alain Dehaze said there is "absolutely no material impact" from the Brexit discussion and the upcoming vote on the UK job market, as general hiring in the UK rose 12% in the first quarter. "What we see is that the uncertainty is growing, and with the uncertainty, some investment decisions and hiring of mainly skilled people are delayed because our customers are willing first to wait and see what the decision will be here,” Dehaze said. "The hiring regarding new investments here in the UK (is) where you see the delay in decisions." Dehaze said that the UK should stay in the EU as both will be strong together.