Primarily due to contractors’ faults, construction industries in Malaysia have been facing problems such as delays, wastages, cost overruns and others. Inability of construction manager (CM) to efficiently manage construction projects is the major contribution to projects’ failure, and the lack of terms of reference on the technical competency for CM are believed to be the major setback. This paper reports the results of a preliminary study which was carried out to identify the technical competencies of CM. Exploratory mixed research methods were selected by employing qualitative and quantitative approaches. Multi-layered thematic analysis was embedded into literature analysis to maintain reliability and then validate through structured interviews. It was found that CM requires several technical competencies including managing staff, materials, labours, plants, sub-contractors, safety, money, quality, time, environment, administration, pre-construction, closeout and handover, responsibility to other parties, computer literacy, and administration of construction contract. Hence, the technical competencies for CM are believed to be exhaustive and holistic in singling out the appropriate technical knowledge and skills, and bring about numerous advantageous towards technically competent CM.