Elsa: Thank you. I "see" differently today, need to change eyes from right to left might have added to that. IIRC this was a 3 hour job, shooting 10 classes, each of ~30 students on a neutral BG. I did not change the setup for the portraits because the teachers came and went with their classes and the portraits were just a "goodie", while the paid for part were the group shots.
The reflections on the skin of the company workers looks as if you used flash light with two soft boxes, one on the left and one on the right.
I avoid using flash light apart from BG or Contour.