Jong Ajax
At first instance Vermeij joined the newly promoted reserves team Jong Ajax, playing in the Dutch Eerste Divisie, the second tier of professional football in the Netherlands. He made his debut for Jong Ajax in the regular season away match against MVV Maastricht on 17 August 2013. The match ended in 1–0 loss for the Amsterdam side. He scored his first professional goal for Jong Ajax in his second appearance in a match against Jong Twente on 30 August 2013, scoring in the 38th minute of the 2–1 win at home.