The 21-year-old, who currently plays for the LIONSXII - the team representing Singapore in the Malaysia Super League, has been touted as one of the brightest talents to emerge from the island nation.
And now, Mendes - considered to be one of the most powerful agent in world football - has thrown his weight behind him.
"Getting Hariss a contract with European clubs is not a problem. But I want him to be assessed by a few coaches first to get him the best possible deal and he must be here before the European season starts in August 2013," he told Singapore's TODAY newspaper.
TODAY reported that Mendes is working with Singapore billionaire Peter Lim - he of the attempted Liverpool takeover fame in 2011- to unearth promising youngsters in the region.
Hariss, who holds the record for being the youngest Singaporean to represent his country at the international level, trialled with Chinese Super League side Shanghai Shenghua (the club that former Chelsea striker Nicolas Anelka plays for and manages) in 2010, but the move fell through because the he didn't feel at ease in a foreign nation.
However, the hard-tackling midfielder insists that is no longer a stumbling block.
"Settling down by myself in another country is no longer an issue," he said.
"I'm only worried that I'll be 23 in November next year and I just wonder if clubs there may find me too old.
"But if Mendes gets me into a European club, you can be sure I won't waste the chance. It's the chance I've been waiting for."
Given that Hariss is currently completing his National Service duties with the Singapore Police Force - he has no choice but to wait until next year to try and achieve his dream.
However, Mendes does not think that will be a problem.
"Hariss has to finish his NS and that is not a problem, not even his age. I know what to do to get him playing in Europe and will get it done.
"What we need now are videos of him, which I can use in the meantime to talk to coaches in Europe."
While the details of any potential moves are threshed out, one of Singapore's most promising players will continue to enthral local fans with his crunching tackles for the LIONSXII as they try to maintain top spot in the Malaysia Super League.