Complex sentence: Osorio began working at The Source magazine in 2000 as an Associate Music Editor and was later promoted to Music Editor, she was given her last position in 2003 as Editor-in-Chief, the first female EIC in the history of the publication.
Split into simpler sentences: Osorio began working at The Source magazine in 2000 as an Associate Music Editor and was later promoted to Music Editor. She was given her last position in 2003 as Editor-in-Chief, the first female EIC in the history of the publication.