Tina Castaneda is charged with theft.
Prosecutors say she was working as an accountant when she siphoned more than $600,000 over a three-and-a-half year period.
Castaneda worked for Disteldorf in Oak Lawn, where she managed the funds for the Nash Group, which is a health care consulting firm in Oak Lawn.
Castaneda is accused of taking money from the Nash Group.
