Irish import Colin O'Riordan has signed a new two-year contract extension, tying the Irishman to the Sydney Swans until at least the end of 2019.

And the new deal comes packaged with a senior elevation, with O'Riordan one of two rookies who'll be promoted by the Sydney Swans at Friday night's National Draft.

The Sydney Swans will use their last two picks in the draft (#84 and #92) to elevate O'Riordan and Lewis Melican, while Robbie Fox, Toby Pink and Ben Ronke will be retained on the rookie list for season 2018.

Recruited as a Category B Rookie at the end of 2015, O'Riordan has spent the past two seasons honing his new craft under Rhyce Shaw's tutelage in the NEAFL.

The junior Gaelic star repaid the Swans' faith almost immediately by impressing the coaches with his work ethic and professionalism on the way to earning a spot in the NEAFL Team of the Year.

The 22-year-old will now be aspiring to earn an AFL debut.

Meanwhile Melican's promotion comes after an impressive debut season in which the defender played 17 senior matches.

After running out in the red and white for his first AFL match in Round 5 against GWS, the 21-year-old became a regular fixture in Sydney’s defence, his performances earning an AFL Rising Star nomination on the eve of finals.

Of the three players being retained as rookies, Fox also featured at senior level in 2017, playing three games, while Pink and Ronke are yet to debut.