There is "absolutely no material impact" from the Brexit discussion and the upcoming vote on the U.K. job market, the CEO of staffing firm Adecco told CNBC on Tuesday, as general hiring in the U.K. rose 12 percent in the first quarter.
The U.K. heads to the polls in June to decide whether or not to leave the European Union. A vote to exit the union could affect the labor market significantly.
Alain Dehaze, the boss of the largest staffing company in the world, said sectors such as IT and finance were however waiting for the outcome of the vote before making decisions on hiring for projects.
"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 told CNBC.
"The hiring regarding new investments here in the U.K. (is) where you see the delay in decisions."
Dehaze believes that if the U.K. was to stay in Europe, the decisions regarding new investments will be made the "day after the vote."
However, if the U.K. votes for Brexit, negotiation periods for new investments "will last at least two or three years before the U.K. will have actual agreements, trade partners – that's when you'll see customers delaying their decisions or just decide to invest somewhere else."
Dehaze added that personally, he thinks the U.K. should stay in Europe: "I think that U.K. together with Europe will be stronger and I also think Europe with U.K. will be stronger."
Separately, a survey released Tuesday by the online jobs website Indeed.com showed that raising the U.K.'s national wage has negatively affected recruitment in 12 out of 13 job sectors.
Only the hospitality sector saw an increase in hiring; other sectors including construction, education and finance saw a 9 percent drop in vacancies in April.
"The policy may have unwittingly made life somewhat harder for some job seekers," said Mariano Mamertino, an economist at Indeed.com.
The National Living Wage is currently set at 7.20 GBP per hour ($10.43).