Playing at the old ground of Neath F.C., Llandarcy Park, the new club proved a formidable force in the league, finishing second to Goytre United at their first attempt.

However, due to Llandarcy Park not meeting the required Welsh Premier League ground criteria, Neath was refused entry.

With this success and the improvements to Llandarcy Park, Neath Athletic was eligible to play in the Welsh Premier League.

On 13 July 2010, Neath announced the double signing of two marquee players in readiness for the 2010–11 season, former Swansea City favourites Kristian O'Leary and Lee Trundle.

On 21 May 2011, Neath defeated Prestatyn Town 3–2 at The Gnoll in front of a club record 1,000 fans in the first ever Europa League Play-off.