Mise
Budget for an hour. You would probably need to leave Carpenterstown 7:00 a.m. at the latest. The route I used to take was via Strawberry Beds, Lucan, via Baldonnel.
Gettin gout of Citywest can be dicey especially at that time due to volume of traffic, but again I would budget for an hour taking the same route back.
Best of luck in the new job.
C