Open Systems SASE

Our future-proof SASE platform as a service, with 24×7 support, allows you to enable network simplicity, intelligent security, and performance.


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SASE: The Network of the
Future Is Here Today

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Find the latest customer stories, solution briefs, white papers, videos, events, webinars and third-party research about SASE.


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Gartner Market Guide for Managed Detection and Response Services, 2020

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We’re uncompromising in the pursuit of growth, and we’re proud of the network and the people that make our growth possible.


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Accelerate your Journey to
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Open Systems

Open Systems is the preeminent cybersecurity and connectivity provider for the enterprise cloud.


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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