While the Career Indecision Profile–Short (CIP-Short) has demonstrated sound reliability and validity as a brief measure of career indecision in students, its psychometric performance in employees remains unclear. To facilitate research and practice on career indecision within the employee population, the present study examined the internal consistency reliability, structural validity, and convergent validity of the CIP-Short in employees. Additionally, the present study examined the measurement invariance of the CIP-Short across students and employees. Based on a sample of students ( n = 330) and a sample of employees ( n = 436), the results revealed that (1) the CIP-Short demonstrated good internal consistency reliability in employees, (2) the CIP-Short validly measured the four-factor structure of career indecision in employees, (3) the CIP-Short was positively associated with career decision ambiguity aversion and negatively associated with career adaptability in employees, and (4) the CIP-Short demonstrated measurement invariance on configural, metric, and scalar levels across students and employees. The theoretical and practical implications of this study are discussed, along with limitations and suggestions for future research.