| PSI Group | |||
| www.psiag.com | PSI Group | ||
| www.psiag.co.uk | PSI England | ||
| www.psi.pl | PSI Poland | ||
| Energy Management | |||
| Branch/Main Focus | URL | Company | |
| Electrical Energy | www.psienergy.de/en | PSI AG business unit Electrical Energy | |
| Oil Gas | www.psioilandgas.com | PSI AG business unit Oil and Gas | |
| Energy Industry | www.psi-energymarkets.de | PSI Energy Markets GmbH | |
| Communication Technology | www.psinentec.de/en/ | PSI Nentec GmbH | |
| Manufacturing | |||
| Branch/Main Focus | URL | Company | |
| Automotive Mechanical Enineering Plant Construction | www.psipenta.com | PSIPENTA Software Systems GmbH | |
| Metals | www.psimetals.com | PSI Metals GmbH | |
| Mining Traffic Telematics | www.psi-production.com | PSI Production GmbH | |
| Logistics | www.psilogistics.com | PSI Logistics GmbH | |
| Decision Support Process Optimisation | www.fuzzy.de | F/L/S Fuzzy Logik Systeme GmbH | |
| Infrastructure Management | |||
| Branch/Main Focus | URL | Company | |
| Traffic | www.psitranscom.de/en/verkehr | PSI Transcom GmbH | |
| Safety | www.psitranscom.de/en/safety | PSI Transcom GmbH | |
| Control Systems Automation Technology | www.incontrol-tech.com | PSI INCONTROL SDN. BHD. | |
