An Post-Chain Reaction Sean Kelly Cycling is a UCI Continental cycling team registered in Ireland, based at Merchtem (Belgium), that participates predominantly in races on the UCI Europe Tour. The team is managed by Kurt Bogaerts and Sean Kelly with sports director Niko Eeckhout.

The team began in 2006 with the name Sean Kelly Team ACLVB-M Donnelly as the first Irish professional cycling team. Shortly after its launch another Irish continental team was launched, Team Murphy & Gunn-Newlyn. For the 2007 season, these two teams merged to form the Murphy & Gunn-Newlyn-M Donnelly-Sean Kelly team. At the end of 2007 it was announced that An Post would replace Murphy & Gunn as main sponsor while Grant Thornton replaced the Newlyn group as a co-sponsor.