Having references from various organizations showcases different aspects of an individual's professional capabilities and allows potential employers or institutions to gauge performance from diverse perspectives. Each reference can provide unique insights into specific skill sets, teamwork contributions, or leadership qualities displayed in different work environments. This enhances credibility and provides a more well-rounded assessment of an individual's professional strengths.
Additionally, drawing references from various employers reduces the potential for bias or the appearance of a closed circle of references, particularly if the former company has limited professional connections externally. This broader representation adds credibility to references and helps potential employers or institutions obtain more objective evaluations.
For these reasons, while not explicitly prohibited, it is preferable to have professional references from different companies to ensure a varied and credible assessment of an individual's professional competencies.