Two-time Bathurst winner Davison forms the other half of DJR's all-new line-up for 2021, having raced for the team on a full-time basis between 2006 and 2008.
Davison and De Pasquale both arrive at DJR as race winners, with Davison a 19-time winner and De Pasquale having scored his first win at Hidden Valley last year.
The next milestone in DJR's sights is 150 wins, with the Ford team entering the 2021 season on 137.
Only Triple Eight (203) and Walkinshaw Andretti United (180) have reached the milestone.
Dick Johnson Racing championship race winners
48: Scott McLaughlin 30: Dick Johnson, John Bowe 8: Fabian Coulthard, Paul Radisich 7: James Courtney 3: Steven Johnson 2: Will Davison, Alex Premat 1: Jonathan Webb, Chaz Mostert
Championship race wins (current teams)
203: Triple Eight Race Engineering 180: Walkinshaw Andretti United/Holden Racing Team 137: Dick Johnson Racing 74: Tickford Racing/Prodrive Racing Australia/Ford Performance Racing 14: Brad Jones Racing 11: Team Sydney/Tekno Autosports 7: Erebus Motorsport 6: Kelly Racing/Nissan Motorsport