Hi @JoakimR 

Questions

1. Is it possible to have a SysAdmin who works 2-3 hours a day?

Atul: Yes, you can do 2-3 hr job, but you need to see if anyone hiring for admin role, i will say learn ITSM and HRSD/GRC then it is easy for you to get the part time job. Try  on linkedIN/ upwork etc.

1. If (1) is possible, do I have to get a certification before someone hires me?

Atul: If you have certification that will be good , bcz it has been asked many clients and companies now a days but again not mandatory.