[1] Dombrandt began playing rugby at the age of six for Warlingham R.F.C and Old Caterhamians in Surrey, originally at fly-half before switching into the forwards pack.

[3] In the summer months when not playing rugby, Dombrandt can be found indulging in the preseason training tradition of professional egg catching on the beaches of Dorset.

[7] In June 2019 he was one of four uncapped players named in England's preliminary World Cup training squad[8] but was not selected for the tournament.

[10] He scored a try during Harlequins 43-36 defeat of Bristol Bears in the Premiership semi-final, a game in which Quins recovered from a 28 point deficit to win.

[12] In April 2024, he started for Harlequins in their Champions Cup Round of 16 victory over Glasgow Warriors, winning 28-24 at The Stoop, the first time the club had ever won a knockout game in the competition.