Sellhorn Holding GmbH ist the main shareholder of the companies that form Sellhorn Group. In addition to that Sellhorn Holding offers consulting services in the areas of management, administration, finance and project development for the affiliated companies.

The consulting and planning services of Sellhorn Ingenieurgesellschaft cover the entire field of engineering in the construction industry. A mid-sized company, international and independent for more than 60 years.

Since 2016 Sellhorn Africa Consulting Ltd. with headquarter in Dar es Salaam, Tanzania, has been offering the full range of consulting and planning services of Sellhorn Group for the African region.

Since 2017 the joint venture of Sellhorn Ingenieurgesellschaft and Oiltech Group of India provides consulting and planning services in the construction industry with a focus on hydraulic engineering and coastal protection for the Indian market.

In 2010 Sellhorn ME was founded as a joint venture between Sellhorn Ingenieurgesellschaft and Tassoco SARL in Beirut to offer and carry out the engineering services of Sellhorn Group in the Middle East.

PBVI offers engineering services in the field of consulting and planning of infrastructure projects, construction supervision of railway construction sites as well as design, rental and installation of automatic track warning systems. As part of Sellhorn Group, the former ICB GmbH Berlin was merged into PBVI, where Sellhorn Holding is a shareholder.

As a member of Sellhorn Group inveni portum solutions GmbH works with and for the group as a consultant for port management and port operational planning. They are specialised in strategic, economic, financial as well as technical advisory to the maritime ports and logistics sector.