The article examines the profession of the consulting engineer within the FIDIC contract model through the lens of the sustainable development concept. It is emphasized that in the context of Ukraine’s post-war reconstruction, the role of the consulting engineer is significantly expanding, as this professional acts as an independent institutional actor responsible for coordinating project participants, managing risks, ensuring quality control, and maintaining process transparency. Based on an analysis of regulatory documents, international reports, and scholarly sources, the study identifies the essence of engineering consultancy and outlines the functional duties of the consulting engineer under FIDIC contracts. The article reveals the nature of sustainable development in the infrastructure sector and identifies its three key pillars: economic, environmental, and social. It is demonstrated that the professional functions of the consulting engineer inherently correspond to each of these components. Economic sustainability is supported through cost and resource management; environmental sustainability—through the implementation of climate-resilient and nature-based solutions; social sustainability—through stakeholder engagement, adherence to safety requirements, and the maintenance of institutional integrity. It is established that the consulting engineer may be considered a key facilitator and ambassador of sustainable development principles in infrastructure projects, ensuring the durability, efficiency, and safety of investments. The conducted research provides a comprehensive overview of the consulting engineer’s profession and defines their central role in ensuring the sustainable development of infrastructure projects within the FIDIC contract framework. The study finds that the consulting engineer acts as an independent administrative entity combining technical expertise, managerial functions, and stakeholder coordination, thereby ensuring decision coherence and process transparency. The integration of economic, environmental, and social aspects of sustainability throughout all stages of the infrastructure project life cycle positions the consulting engineer as a pivotal element in shaping long-term resilient transport infrastructure. The findings may be used to improve infrastructure project management systems, harmonize national legislation with international standards, and strengthen the professional competencies of consulting engineers
Левіщенко et al. (Tue,) studied this question.