Management Consultant Competencies for Environmental, Social, and Governance-Oriented Green Transformation in Taiwan: A BWM–TOPSIS Approach

Environmental, social, and governance (ESG)-oriented green transformation is reshaping the competency requirements for management consultants, particularly in Taiwan, where firms face growing pressure to disclose sustainability information, manage carbon, and comply with regulations. Yet limited research has systematically identified and prioritized the competencies required of consultants supporting this transformation. This study develops an integrated competency-prioritization framework using expert content validation, the best–worst method (BWM), and the technique for order preference by similarity to ideal solution (TOPSIS). An initial pool of 150 competency items was generated from a structured literature review and refined by six experts using a strict one-strike rule, yielding 48 validated competencies. Survey data from 54 professionally relevant respondents were then analyzed to estimate competency weights and rankings. The results show that communication and advocacy capability was the leading dimension, with a weight of 37.1206%. At the item level, the highest-ranked competency was the ability to negotiate with stakeholders and build consensus on sustainability initiatives. The study contributes a BWM–TOPSIS-based competency prioritization framework and offers practical guidance for consultant selection, capability assessment, training design, and professional development in ESG-oriented green transformation contexts.