The midfielder had a stellar season in National League South, gaining plaudits from supporters and players alike.
Zac, scored eleven times during the campaign, a tally that earnt him a place in the official National League South Team of the Season.
He also surpassed the 250-appearance mark for the club whilst winning both the Supporters' & Player's Player of the Season Awards here at the Oxford City End of Season Awards.
Speaking after signing his new deal, Zac said:
"I'm delighted to be staying. Last season was special and the vibe in the dressing room was one of the best I've experienced.
"For me, it was a good season individually too, but now I'm looking forward to next season."
"It'll be tough but we know what we're capable of and we know our standards. We believe in ourselves and we're going to give it a really good go!"