Well, in my case I would advise my client to seriously consider taking some time off of work as its difficult to help others when you yourself are drinking. I'd also suggest they consider a career change until they can remain sober.
I also would set small goals with them and if they slipped I would talk with them about it without judgement but rather what was going on during the time they decided to drink and how to avoid that situation in the future. Than, I would ensure they had a support system and I would teach them about the AV and to be mindful of it.
Another suggestion I would offer is to remind them that most cravings subside in about 30 minutes and not to think in terms of forever. Instead of thinking I can never drink again, try to just take it one day at a time, one hour at a time, hell one minute at a time if necessary.
Of course I would provide them with referrals to AA or Lifering.