SiO Signalteknik

SiO Signalteknik was founded in 2011 and operates in Sweden, headquartered in Hedemora with local offices in Borlänge and Gothenburg. The company specializes in signalling systems and traffic control within railway infrastructure. Services include design, internal and safety reviews, commissioning inspections, site supervision (BPU), assessment, Factory Acceptance Testing (FAT), and training services. Clients are primarily organisations and operators within the Swedish railway sector.

AceRail

AceRail was founded in 2013 and operates in Sweden. The company offers infrastructure consulting services such as project and construction management, design, and inspections. Its clients are mainly public sector organizations in major infrastructure projects.