The modern-day business environment in the construction industry is highly competitive, therefore organizations need to ensure effective project delivery in other to gain competitive advantage. This study assesses the factors influencing the effectiveness of knowledge transfer among employees of building construction firms located within Abuja Nigeria. A well-structured questionnaire was administered to registered building construction professionals on knowledge transfer in construction firms. Management staff comprising of Quantity Surveyors, Builders, Engineers, Architects and Estate Values were sampled. 380 questionnaires were administered in total, 136 were completed and retrieved. The study reveals the factors with great influence on knowledge transfer among employees in these firms are; attitude to leadership, organisational goals, training, organisational values, communication, reward system, availability and access to ICT too by employees. Hence the study recommends top management should understand the role of knowledge management in achieving organizational goals, convey appropriate leadership attitude towards knowledge sharing. Ensure clear and flexible lines of communication throughout organisation and encourage good interaction, knowledge sharing and improve knowledge creation capabilities among employees. Firms should provide adequate training and required ICT tools. Also ensure fair reward system for outstanding employee performance on relevant knowledge sharing. These will generally improve knowledge transfer and knowledge management process and the overall performance

Keywords : Knowledge Management, Knowledge Transfer, Employee Performance.