Our study delves into the imperative need for decarbonization within the construction industry. Specifically, we investigate the procurement function's role in steering this transition towards a more sustainable industry. Employing a two-fold methodology, we conducted a bibliometric analysis to examine the existing academic discourse on sustainable procurement. Subsequently, we conducted semi-structured interviews with procurement professionals from three prominent construction companies. Through this combined approach, we aim to understand how procurement practices are adapting to integrate corporate social responsibility (CSR) principles and achieve low-carbon objectives. Our findings underscore the significant transformation underway within the procurement function, positioning buyers as pivotal figures in the decarbonization agenda. They grapple with the challenge of balancing economic gains with environmental performance, a task facilitated by enhanced integration of sustainability objectives within their decision-making processes. Despite these advancements, obstacles such as sectoral disparities in sustainability maturity and the necessity for substantial investments in greener alternatives persist, warranting further exploration and strategic interventions.