Solutions Overview

Open Systems offers a secure access service edge (SASE) package that’s tailored to your network and security needs.


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Call it "Sassy" - Gartner Calls SASE Transformational

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Stefan Keller

Stefan Keller

Stefan Keller studied at the Swiss Federal Institute of Technology (ETH) in Zurich. He holds a Master of Science degree from ETH Zurich in Information Technology and Electrical Engineering. Additionally he completed the Customer-focused Innovation Management certification at Stanford Business School.

After his studies, Stefan Keller got a job directly with Open Systems in 2008, and worked in several positions, first in the area of Professional Services and then in Development as a Senior Vice President Product Development, responsible for Network Services. He is currently Head of Development at Open Systems.

  • Coolest personal accomplishment: Apnea Academy Freediving Instructor in 2016
  • Superpower: Staying calm in dynamic situations
  • Professional accomplishment: I feel proud to build and grow Open Systems service development program