Dobson, who signed for West Ham in July 2015 from Premier League rivals Arsenal, never played for the first team, however he found himself an essential part of Terry Westley’s youth set-up, helping the Hammers to Premier League cup glory in May 2016.
The 19-year-old joined Sky Bet League One side Walsall on loan at the start of last season to further his development, where he played 26 times, scoring once in a 2-1 defeat at Fleetwood Town.
After finishing his loan spell he returned to West Ham, where he helped the U23’s PL2 side clinch promotion, with victory over Newcastle United in the Play-Off Final.
The midfielder puts pen-to-paper on a two-year deal at the Castle, with an option for an additional season.
Speaking on the signing of George Dobson, Rotterdam manager Alex Pastoor said;
"George Dobson is an all-round midfielder. That means he can at multiple positions in our team from the feet. Despite his young age, he looks from his game already quite mature.
“Last season he was with West Ham United on-loan to Walsall and played more than 20 games in League One. We welcome his arrival and he will join tomorrow's training."
WE WISH YOU ALL THE BEST IN YOUR FUTURE, GEORGE.