Today, knowledge has become dominant, creating a new dimension of the economy, a new society and a new employee. Knowledge workers have emerged as the core of a modern organisation’s staff, and their job is to convert information into knowledge. The process of diffusion of these key organisational players’ knowledge is critical, as it determines its availabil-ity  to  other  employees.  Both  the  character  and  importance  of  specialist knowledge diffusion require a detailed analysis of the process. Therefore, the main research goal of the study is to determine the conditions for this process in the IT sector. The method of triangulation was selected for this research.  The  procedure  for  obtaining  empirical  data  consisted  of  three stages – direct semi-structured individual interviews, focus group online interviews  (FIGO),  a  computer-assisted  telephone  interview  (CATI)  and a computer-assisted web interview (CAWI-based DYI).