Cosim began her career as a journalist at
ABS-CBN News and Current Affairs, hosting the programs
Magandang Umaga, Pilipinas,
Salamat Dok, the hourly news updates, and
Gising Pilipinas on
DZMM. After 14 years at ABS-CBN, she joined
News5, the news department of
TV5 as an on-air presenter in summer 2010. Cosim became the co-anchor of
Aksyon with
Erwin Tulfo. In 2014, she became the news anchor on the late-night newscast
Aksyon Tonite. In 2016, Cosim joined
Aksyon sa Umaga together with
Mel Sta. Maria, replacing
Martin Andanar and
Erwin Tulfo. Cosim currently heads the network's morning program,
Perfect Mornings, the afternoon newscast
One Balita Pilipinas, the primetime newscast
Frontline Pilipinas, alongside
Julius Babao, and the public service radio program,
Sagot Kita. ==Personal life==