The 21-year-old has impressed while on loan at Glenavon, who he joined in January.
“What Brian has done thus far has been most impressive. It hasn’t surprised me or my coaching staff how well he has done,” said Blues boss David Jeffrey.
“Brian’s period at Glenavon has benefited Glenavon and himself and I also believe it will benefit Linfield.”
“Brian needed a regular opportunity to get playing and what he has shown thus far, has shown me that he will certainly be an excellent member of the squad for next season,” Jeffrey told the club website.
“As is always the case I, in conjunction with my coaching staff and the team committee, am always reviewing and assessing the strength of the squad.
“At this moment in time, we are placing a particular focus on the players coming out of contract at the end of the season.
“In recent weeks we have been delighted to re-sign Michael Gault and Michael Carvill.”
