How to create a flex-field that loads information based on other flexfield?

Summary:

I need to create a Technologies drop-down and then create a sub Technologies drop-down that will load information based on what is chosen in Technologies drop-down. I need to have this in Person Management - Employment area. Is that possible?

Content (required):

I need to create a Technologies drop-down and then create a sub Technologies drop-down that will load information based on what is chosen in Technologies drop-down. I need to have this in Person Management - Employment area. Is that possible?

Version (include the version you are using, if applicable):

23B (11.13.23.04.0)

Code Snippet (add any code snippets that support your topic, if applicable):