Kosinski began work in broadcast journalism in Rockford, Illinois for WIFR while earning her BA and MA from the Medill School of Journalism at Northwestern University. Leaving WIFR, she moved to Charlotte, North Carolina at WSOC-TV and founded the Piedmont Bureau. In 2001, she was voted the Best Reporter in Charlotte by readers of the city's arts and entertainment magazine. In Fall of 2001, she left WSOC-TV for WTVJ in Miami. She is a 2003 Suncoast Regional Emmy Awards Craft Winner for reporting on Haitian immigrants and was named Woman of the Year in 2005 by Women in Communications of South Florida.