Grant, who originates out of South Africa, was added to the Eagles squad for the 2022 Royal London Cup, coming following the loss of multiple players to the Hundred.
26-year-old Roelofsen, who represents the Dolphins in his native South Africa, has been playing club cricket for Billericay over the summer as well as making three appearances for the Essex Second XI Team.
The batter, who can also ply his trade as a wicketkeeper, has represented South Africa at the under-19 level. However, he caught the attention of head coach Anthony McGrath after a remarkable 2022 season for both Billericay, where he scored 1553 runs in 17 games at an average of 103.53 with five 100s. This came before retaining his form in the Essex Second XI, where he has scored 364 in just 6 innings.