„PST GROUP” JSC has had its presence on the Bulgarian and international market since 1968. The company has over 40 years of history and is being a leader in the highway construction, new construction and rehabilitation of existing roads, construction, rehabilitation and maintenance of railways, rails and rail links; maintenance of water and sewage systems; construction and operation of plants and landfills; construction, building, reconstruction and repair of bridges and bridge equipment; maintenance and winter maintenance of the republican and municipal road network; urban communications; engineering and reconstruction of treatment plants for wastewater; construction of infrastructure and landscaping; high construction; manufacture and installation of traffic signs and traffic safety equipment; road construction equipment repairs; construction of processing plants; construction and maintenance of intelligent transportation systems in the populated areas and republican roads; fabrication and installation of links and transition elements for production of asphalt mixtures; construction and maintenance of traffic lights and any other means, providing the organization and safety of traffic; railway roads; production of all types of construction and inert materials and related products.