I would take the job in an instant, provided that they change the procedures a slight bit.
#1) Executions shall take no less than 2 hours to complete.
#2) Cruel and unusual punishment will be put into effect immediately.
#3) Mandatory playing of Air Supply during executions.
#4) Any screams, moans etc by the prisoner will be taken as encouragement to crush their skull in a vice.
If these simple changes were to be implemented, I would be more than happy to take the job.