Transferring from dependent visa to work visa

Hello,
I am under my father sponsorship as dependent, would like to transfer my visa to work visa.
Few months ago my father retired after 20 years + service to one of Saudi ministry and he was encouraged to transfer his sponsorship to my mother who is currently working as teacher.
So few months ago he transferred the sponsorship become spouse (mahram) visa.

This time I would like to transfer my sponsorship to work visa, some says it is impossible because my current sponsor has no working authority.
I would like to know if there is any similar experience.

Thank you  :)

You need to purchase new visa i think.