Sienit Holding has extensive experience in the realization of infrastructure projects on the territory of the country. Large outstanding projects in which the company was involved are Terminal 2 of Sofia Airport, Metropolitan Sofia, „Maritza“ highway and „Trakia“ highway. The company has also experience in the realization of projects related to water and sewage and the construction of waste water treatment plants. The company has the capacity to implement projects for electricity and gas. Sienit Holding has the ambition to extend its activity in the field of infrastructure. .