Service categories (SERCATs) If you're in SERCAT 2, you need to transfer to SERCAT 3, 4 or 5 before you can start SERVOP C. Related topics Is this page useful? Yes No How could this page be better? Please give us your feedback. It will help us improve our website. Please give us your feedback. Feedback Leave this field blank Close Print this page Next ADF Total Workforce System Previous Perform duty in a temporary location