During the intensive segment when you're going three times a week, I don't think work is a reasonable hope. For the treatments after that, it may be. Just keep in mind the potential for anterograde amnesia making things difficult.

I can't recall when I went back to work after starting ECT, but now I go to work the day after treatment. Part of that will depend on the nature of your work. Some jobs will lend themselves to a quick return, while others will not.