Sustainable development of country economy is being driven by various faktors. Economy of each country is comprised of economic sectors. External and internal development drivers differently affect different economic sectors, as a rule. Since economic sectors are not homogeneous, their expanding or contracting dependson behavior of concrete market players; i.e. business companies. The paper aims to reveal factors affecting patterns of development exporting companies attributed to industrial sector and its sub-sectors of Lithuanian economy. Methodology of the investigation is based on development of theoretically grounded questionnare, targeting revealing factors impacting international competitiveness of industrial companies. Impact of factors, attributed to external business environment, and role of factors attributed to internal development forces are to be indicated. Obtained results, is expected, and would allow to foresee trends and main drivers of further development of exporting Lithuanian industrial sectors.