The Mexican international was apart of her nation's 2015 FIFA Women's World Cup squad after earning a call up from Victorian Women's Premier League outfit Heidelberg United.
Guajardo, 24, arrives to the CFA with a wealth of experience, previoulsy plying her trade throughout the United States.
The forward began her professional career with American side Pali Blues, before going on to represent Boston Breakers in the Women's National Soccer League.
She then came to Australia in 2015, domiating for Heidelberg in the WPL.
Mostly deployed as an attacking outlet, Guajardo has largely been utilised as a full back in Montemurro's squad.