Damen joined NAC's youth set-up in 2006 from Sint Anna Boys. He made his professional debut on 23 October 2015 against Sparta.[2] In 2019, his contract at NAC Breda was at the last moment not renewed, resulting in a brief lull in his professional football career.[3]
On 14 January 2020, Damen joined TOP Oss on an amateur contract.[4] After making a good impression, he signed a two-year professional contract six months later.[5] Damen missed almost the entire 2020–21 season due to an injury. On 6 August 2021, he made his comeback in the season opener against Excelsior.[6]
Damen joined Derde Divisie club ASWH on 1 September 2022,[7][8] leaving the club in the winter break.[9]
On 2 September 2023, Damen returned to TOP Oss.[10]
^Scheurwater, Gerrit (4 December 2022). "De Wedstrijden: Het zal toch niet gebeuren…" [The games: It would not happen...]. ASWH (in Dutch). Retrieved 6 December 2022. Nu bekend is geworden dat ook verdediger Grad Damen in de winterstop vertrekt is dit opnieuw een aderlating. [Now that it has become known that defender Grad Damen will also leave during the winter break, this is another loss.]