The Gambia U20 international arrives at the club following his recent departure from League One side Peterborough United.
The midfielder dynamo previously captained Doncaster Rovers’ U18 side, and arrives at the club looking to gain further experience at senior first team level.
He made his debut for the Holy Blues during Saturday’s 4-0 pre-season friendly defeat against Lincoln City at the Northolme.
Last season, Bojang made one solitary appearance on loan for Pitching In NPL Midlands Division side Spalding United, in a goalless draw with Wisbech Town.
"I want to prove to people that I am ready to make an impact in senior football,” he told the club’s official website. “I will add energy and creativity to the team and look to make and score goals.
“I am grateful to Bish and Damo for the chance to express myself at a good level, and look forward to repaying the faith they have shown in me."
Trinity joint-manager Neal Bishop said: "Ethan's signing is a signing we are delighted to get done.
“Similar to Clayton [Donaldson], he is someone that probably could have went to a club further up the pyramid, but we had a really positive chat with him about what we feel we can offer here, the style of play we intend to implement, the type of players we are looking to recruit and what we can do for him as an individual.
“We feel like we can improve Ethan as a player and really push him back towards full-time football. He has that potential."
Photo credit: Peterborough United
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