Brother assuming he is currently not in technical field and completed his degree in 2015, technical knowledge required in industry might be completely different from what he currently knows.
If he wants to join technical job, ask him to try for job without leaving current job. Talk to few people who are in technical job. Give some interviews before deciding.
I know being in a govt job and if not much work is there it feels you are wasting your talent. But don’t leave job because of that.
Start doing part time work in the field you want to go. That will give the real picture, whether you really want to leave or not.