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.
Service: Site Supervision & Inspection
Jezierski & Fors
Jezierski & Fors was founded in 2015 and operates in Sweden, headquartered in Malmö with an additional office in Solna. The company specializes in project management, structural engineering, scanning and 3D modelling, with a clear focus on infrastructure. Clients primarily include organisations across infrastructure, residential, and commercial real estate.
Insinööriavain
Insinööriavain was founded in 2017 and operates in Finland, headquartered in Jyväskylä. The company specializes in structural design, repair and renovation planning, indoor air quality studies, building condition investigations, and construction and site supervision. Clients primarily include construction companies, industrial clients, housing associations, and rental housing companies in central Finland.
Graa Arkitekter
Graa Arkitekter was founded in 1974 and operates in Denmark, headquartered in Odense. The company is a multidisciplinary building consultancy specializing in fire safety consultancy (BK2), technical building advisory, construction management, and site supervision. Clients primarily include public housing associations, commercial property developers, educational facilities, and private residential clients.
Teknikkonsulterna (TKAB)
TKAB was founded in 2018 and operates in Sweden, with offices in Kiruna, Gällivare, and Luleå. The company specializes in industrial electrical engineering, automation, and energy for the process industry, with a strong niche in mining. Services include project and construction management, technical advisory, HSE consulting and coordination, and commissioning. Clients include mining and process-industry companies, contractors, and energy infrastructure owners.
VCON VVS-konsult
VCON VVS-konsult was founded in 1998 and operates in Sweden, headquartered in Mölndal. The company specializes in building services engineering with expertise in HVAC, energy, and indoor climate, providing technical design, energy calculations, climate simulations, CAD and installation coordination, cost estimating, and site inspections. Clients include public and private property owners across new-build and refurbishment projects.
Optireal
Optireal was founded in 2019 and operates in Finland, headquartered in Helsinki with an additional office in Tampere. The company specializes in building services engineering for the construction and real estate sectors, with expertise in HVAC, electrical, and automation systems.
Projkon
Projkon was founded in 2018 and operates in Sweden. The company provides consulting services in infrastructure, energy, and environment. Clients include municipalities, real estate companies, and energy firms. Services span design, project management, permits, procurement, and inspections.
Vibroakustik
Vibroakustik was founded in 2004 and operates in Sweden. The company specializes in acoustics, vibration, and noise analysis, offering consulting services for construction, industry, mining, and infrastructure. Vibroakustik serves clients in both the private and public sectors, ensuring optimal environmental sound conditions.
TEKAB
TEKAB was founded in 2011 and operates across Sweden. The company provides consulting services in electrical, telecommunications, and security systems for construction and infrastructure projects. TEKAB serves public authorities, developers, and contractors, offering expertise in planning, design, and project management.