This paper presents the sociological diagnostics analysis that aims to the assessment of staff's competencies in the Russian museum complex. The current research was carried out in 2014 in Russia (St. Petersburg). The methodology is a structured observation and "Mystery shopper" method. Monitoring of staff competencies was conducted according to the competence model that specified criteria and indicators of observation in assessment cards. Results indicated the level of professional and communicative competence and revealed that the communication with museum visitors is the least developed competence.