I've been looking for this doa for a while. If we recite doa to eat, to study, to sleep, why not recite one to begin and end your work? After all most of your waking hours are spent at work.
Found the doa here:
Here's a copy:
In conjuction with today being a Friday (a good day to do good deeds), let's recite the second doa when you end your work today. Then next Monday we can together recite the doa to begin our work.