Buhagiar, an Australia Under-23 international, joins on a two-season deal while Zuvela re-signs for a further season after an impressive first year with the Sky Blues.
The 20-year-old Buhagiar is famed for his pace and will provide an added attacking option for the Sky Blues ahead of another busy A-League season and AFC Champions League campaign in 2019.
A product of the International Football School, Buhagiar said he was excited to be joining the reigning A-League Premiers.
“Sydney FC are winners and I feel I can take my game to a whole new level at the Sky Blues,” Buhagiar said.
“I’ve heard nothing but good things about Sydney FC’s Members and fans and I can’t wait to pull on the Sky Blue jersey on our journey next season.
“My aim is to work hard, give everything, fight for a place and to grow in a professional environment.”
Zuvela inks his second year as a professional as Sydney FC retain another member of their 2017/18 Premiership and FFA Cup winning squad.
The 21-year old midfielder said he was excited to be continuing as a Sydney FC player, having risen through the ranks of the Sky Blues’ Academy before making his Sydney FC first team debut in their 8-0 FFA Cup thrashing away to Darwin Rovers in August last year.
“I’ve spent the best part of my youth career at Sydney FC, I bleed Sky Blue and I’m pleased to be re-signing for season 2018/19,” Zuvela said.
“I’ve learnt a lot in my time here, the club has made me the player I currently am, and I want to repay that faith with performances on the pitch.
“I’m looking forward to the journey ahead under the new Head Coach and I’m keen to play as many minutes as possible.”