Milford Green FC, who are sponsored by GEOTEC Surveys Ltd, beat Woodham Victoria on Sunday to reach the Prince Albert Cup Final.
The game finished 2-2, with Steven Bullimore scoring twice in the first half for Green but Woodham came fighting back to send the game into Extra Time.
It was Milford Green who held on and dug in through extra time to prevail 3-2 on penalties.
Ryan Millis, the Green goalkeeper, saved the final penalty after Geotec's own Luke Hammond netted his, to send Milford into their first Cup Final in 20 years.
Milford Green will now play against either Byfleet Town or Guildford Athletic Reserves.