To elaborate, "forrige" is used to mean the previous one in a series. So if you have a line of people, and you're talking to them one at a time in order, then you can talk about the one you talked to before the one you're currently talking to as "den forrige." It always refers to an object or person.
"Tidligere" refers to time, any time before now, and never to an object or person.
Forrige is the adjective: min forrige arbejdsplads (Specifically, the one just before this one) tidligere is both adverb: jeg arbejdede der tidligere; tidligere på dagen; tidligere i fjernsynet. But it can also be an adjective: min tidligere arbejsplads. (Could be a long time ago.)