| PSI Group | |||
| www.psiag.com | PSI Group | ||
| www.psiag.co.uk | PSI England | ||
| www.psiag.ch | PSI Switzerland | ||
| www.psipolska.com | 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.nentec.de | 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 | |
| Metals | www.steelplanner.com | AIS | |
| Metals (Aluminium, Copper) | www.psimetals.de/en/met-home/ | PSI Metals Non Ferrous GmbH | |
| Factory Automation 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 | |
| Telecommunication | www.psitranscom.de/en/telco | PSI Transcom GmbH | |
| Traffic | www.psitranscom.de/en/verkehr | PSI Transcom GmbH | |
| Safety | www.psitranscom.de/en/safety | PSI Transcom GmbH | |
| IT-Networks | www.psi.de/itcontrol | PSI AG business unit IT Control | |
| Control Systems Automation Technology | www.incontrol-tech.com | inControl Tech Sdn Bhd | |
