Quality of service is one of the sources of competitive advantage in tourism industry as successful interaction between employees and customers influences income and profit. Clients' satisfaction after the first contact, communication, information and gained proposals usually determines where to obtain the trip package, if other conditions are similar and acceptable. This research aims to determine what core competencies are essential for successful guide/tour escort and travel consultants in order completely satisfy the requirements and expectations of tourism services customers This research presents a new approach to a long-term viability of an enterprise as no similar researches were ever carried in Lithuania. The questionnaires were received from 171 customers, thus ensuring statistically reliable sample for further analysis. The answers, processed using SPSS, confirmed that core competencies of guide/tour escort are mostly hidden, while majority of travel consultant's core competencies are visible. Results of the research will be useful for Lithuanian tourism companies, who seek to improve personnel working with customers skills for realizing the better strategy (guarantee the profit) in order to seek the satisfy expectations of customers. As the tourism is the part of the experience economics, the huge essentials in the success take part the customers expectation realization. The research has shown that managers do not recognize expectations of customers. Using the results of this research in nowadays the quality of services will be better, will be no tourists dissatisfactions and tourism companies will find the method how to expand customers' loyalty to agency ensuring safe and financial vitality future
