Prior organizational shift work research has focused on studying either nurses or blue collar manufacturing employees, and been somewhat limited by shift size limitations. Using a unique sample of 705 full-time medical technologists (MTs), across distinct fixed day, evening, night and rotating shifts, this study found that day shift MTs had lower job content routinization (more task enrichment) than evening, night and rotating shift MTs. Contrary to previous research, rotating shift MTs did not have lower work attitudes than fixed shift MTs. Results are further discussed. Copyright © 1999 John Wiley & Sons, Ltd.