Smith played his junior football with local club Wyoming before first being introduced to the junior representative scene with Central Coast Lightning.

The 18-year-old has scored seven times this season and also made five trial match appearances for the Mariners senior team in the lead up to their Premiership defence, including a memorable strike in his debut starting appearance against Northern Tigers at Mills Park.

Smith was also an inaugural member of the Mariners’ one of a kind Youth Academy, which was founded ahead of the Mariners’ third season in an attempt to indentify and develop the Central Coast’s most promising 15 to 18-year-olds.

Executive chairman Lyall Gorman said: "We’re delighted to have commenced our recruitment campaign for the first ever NYL season with signings that are totally aligned with our club philosophy of looking local and promoting talent from within our region.

"Brady has been on the radar of the Mariners since first joining our Youth Academy and he’s a player that we have identified as one of the Central Coast’s truly promising talents and one that we are incredibly excited by.

"Nathan comes to us from Sydney Olympic in the NSW Premier League, but is a product of central western NSW, which is represented by Western Football – one of seven regions in the state that we enjoy a partnership with.

"I’ve seen Nathan in action with our first team in trial matches previously and I’m excited by just how much he will develop with guidance from one of Australia’s all time great central defenders in our NYL Head Coach Alex Tobin."

Mariners development manager Alex Tobin said: "Both Brady and Nathan are players that we had intentions to sign as soon as the NYL was introduced.

"Both have such huge potential and we hope that they can fulfill this with the Mariners.

"As with all players that we will sign, we hope for them to not only play an integral part in our NYL campaign, but also push for places in the senior squad should the situation arise and both Brady and Nathan have played in trial matches with the first eleven and made the step up quite comfortably.

"The main priority for us with this NYL competition will be to develop players for our senior team and I’m hopeful and confident that each will be ready to make the step up to the Hyundai A-League in the coming season or in future campaigns."