The club gained SFA membership in 2020 after upgrades were made to the ground, which included the addition of floodlights.

The following players made the grade in the Senior game: November 2007 saw Polish midfielder Lukasz Rusin become the first Haddington player in recent times to seek success in the higher grade when he joined Brechin City for a short spell.

However, his progression was hampered by a persistent injury and Rusin took some time away from the game before returning to Junior football with Spartans for the 2011–12 season In July 2012, prolific striker Sean Jamieson signed for East Fife after a successful trial period.

In two seasons for the Hi His, Jamieson scored 64 times in 72 appearances (three as substitute) In 1948, Dougie Armstrong became the club's only Junior internationalist player when he played for Scotland against a Republic of Ireland team.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.