This study aims to explore the environment, behaviour patterns, and use of information and communication technologies (ICTs) for knowledge sharing (KS) practices by the professionals from different sectors in Bangladesh. This study employs the quantitative approach and a survey method. The findings show that the professionals held positive perceptions about KS practices and most of them believe that KS practices can enhance their professional efficiency. While most professionals found ICTs useful for KS, they faced technological problems in addition to communication and social problems in sharing knowledge.