The existence of a large number of contractors in a limited number of projects and uncertain construction industry environment results in intense competition between them; with the selection of the contractors as a challenge most at times to clients. The study aimed at examining the contractor selection management and quality assurance in construction works in emergencies within the UNDP Stabilization Programme in North-East Nigeria. Achieved through specific objectives such as: analyzing the relationship between contractor project budget-cost compliance and the timely delivery of emergency projects for UNDP‘s stabilization project managers in North-East Nigeria; and examining the relationship between contractor technical capability and the occurrence of zero defects and failures in emergency stabilization projects in North-East Nigeria. The study adopted quantitative research design (survey design) with the questionnaire as the instrument for primary data collection. The questionnaire was designed and validated and reliable before administering the questionnaire in the field. The data collected through the questionnaire was analyzed using descriptive method of data analysis utilizing frequency count and simple percentage with the help of Statistical Package for Social Sciences (SPSS). The findings based on the research objectives revealed that: there is very strong relationship between contractor construction budget-cost line compliance and timely delivery of emergency construction in UNDP with 93%; there is strong relationship between contractor technical capability and the occurrence of zero defects and failures in emergency stabilization projects in NorthEast Nigeria with 67.2%. The research recommended that emergencies construction projects in UNDP in the North-East should base operational decision on transparent and defined operational indicators that guide contractor selection and quality assurance; and, project end-user knowledge and psycho-social situations should be well understanding by all contractors (direct implementers and third parties)