Boss Garry Wilson admitted it was mission accomplished after Eastbourne Borough clinched promotion to Blue Square premier after victory in the play-off final.
Borough had to withstand intense pressure for the majority of the game before late goals from Nathan Crabb and Paul Armstrong saw them defeat Hampton and Richmond 2-0 at Stevenage.
Wilson took over at Priory Lane together with assistant Nick Greenwood nine years ago when the club was in the County League and is now looking forward to mixing it with some of the games big names.
He said: "I'm absolutely delighted for everyone at the club, especially all the people who have been here a lot longer than me.
"When I came in we said we would take the club to the Conference premier and it was a brilliant feeling to have delivered on that promise.
"When we took over we were playing in front of 30 fans some weeks but we can now look forward to playing the likes of Wrexham, Mansfield and York next season.
"What we have achieved probably won't fully sink in for a little while but it is the best moment of my career without a doubt."
Chairman Len Smith praised Wilson and Greenwood for the transformation they have performed at the club and believes they can make them a force in the Blue Square premier.
He said: "Garry and Nick have worked wonders at this club and I think they can take us a lot further.
"It is going to be tough next season as we will probably stay part-time but I am confident that our management team is good enough to establish the club in the Blue Square premier."
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