Hämmerli (born 31 December 1958) is a Swiss computer scientist in the fields of communications, networks and information security, specifically critical infrastructure protection in the European Union.
He is teaching internationally, as a professor at both the Lucerne University of Applied Sciences and Norwegian University of Science and Technology.
He was president of the Swiss Informatics Society from 2009 to 2014 and chair of the platform ICT Security of the Swiss Academy of Engineering Science from 2012.
He has directed a new academic course Information & Cyber Security in Lucerne from 2018.