Organizations use both tangible and intangible resources for their existence to achieve sustainable development goals. Organizational knowledge mainly comprises of tacit knowledge held by employees. It becomes more critical when the situations are unpredictable, for example in rescue/disaster projects involving human lives at risk. Tacit knowledge utilization has been understudied particularly in such environments bounded by resource constraint and sustainability issues. This qualitative research attempts to fill this gap by collecting data from the knowledge workers in a large public sector non‐profit rescue organization. The study reveals various individual level, group level, organizational level, community level, and situational level factors, which impact the tacit knowledge utilization of rescue workers to properly execute emergency life threatening rescue operations and sustainability issues.