[quote=Assallya]
Fixers aren't hackers.
[/quote]

When it was revealed that Clara was the hacker who gave the bad guys Aiden and Damien's name, Clara referred to Aiden as a fixer.

Aiden was most definately a hacker as well.

EDIT: Just watched the cutscene again, she said one was a hacker and the other a fixer, never said which was the hacker or the fixer. Damien is definitely no fixer to much of a pansy for that. That only leaves Aiden as a fixer who is also a hacker.