PSI Paul Scherrer Institut | 40,847 followers on LinkedIn. Wir schaffen Wissen – heute für morgen | The Paul Scherrer Institute PSI develops, builds and operates large, complex research facilities and makes them available to the national and international research community. The institute's own key research priorities are in the fields of future technologies, energy and climate, health innovation and fundamentals of nature. PSI is committed to the training of future generations.