Tony Benson - playing off his 13 handicap - completed a Carrickblacker round of 75 on Saturday.
That score helped to secure success in the Coronation Cup and Cancer Fund for Children qualifier.
His nett 62 score placed Benson at the head of the field, with birdie ‘twos’ at the 13th and 15th holes crucial towards top spot.
He will now represent Portadown at the regional finals around Rockmount during September.
Ronald Withers was runner-up on nett 64, with Ronnie Hynds next home thanks to nett 65. Sammy Walker posted nett 66 for fourth then Jason Armstrong and Martin Rowland shared nett 67 apiece.
Martin Rowland wrapped up the top six on nett 67. Stephen Poole lifted the gross prize with 73.
In the Thursday Stableford, Geoff Robinson finished first on 41 points.
Pete Savage secured second courtesy of 40 points and Bryan Harvey completed the top three with 38 points.
The gross was won by Joel McCrory on 73.