Position
Chief Executive Officer
Company
Open Systems
ZurichSecurityCyber SecurityNetwork SecurityDescription
Open Systems announced that Dennis Monner will succeed Daniel Neuhaus as Chief Executive Officer effective October 1, 2025. Monner brings over 25 years of experience in cybersecurity and cloud solutions, guiding the company into its next phase of growth.
Quick answer
Open Systems Appoints Dennis Monner as Chief Executive Officer (September 30, 2025). Open Systems is based in Zurich, Zurich, Switzerland.
- Who is the new Chief Executive Officer at Open Systems?
- Open Systems named Dennis Monner Chief Executive Officer, announced September 30, 2025.
- What did Open Systems announce on September 30, 2025?
- Open Systems announced that Dennis Monner will succeed Daniel Neuhaus as Chief Executive Officer effective October 1, 2025. Monner brings over 25 years of experience in cybersecurity and cloud solutions, guiding the company into its next phase of growth.
- What does Open Systems do?
- Open Systems is a leading provider of native Managed SASE solutions, converging network and security functions on a cloud-native platform.
- Where is Open Systems based?
- Open Systems is based in Zurich, Zurich, Switzerland.
- Which similar companies made leadership changes around the same time?
- Exabeam (October 8, 2025), ChaosTrack (October 8, 2025), Brinqa (September 18, 2025) and CyberMaxx (September 16, 2025) also announced leadership changes within 45 days of Open Systems.
Source: Fundz verified event record.
Other recent leadership changes in Security and Cyber Security
Executive moves at companies in the same sectors within 45 days, from Fundz verified event records.
- Exabeam Appoints Pete Harteveld as Chief Executive Officer (October 8, 2025)
- ChaosTrack Appoints David Troha as CEO and Jay Manni as CTO (October 8, 2025)
- Brinqa Appoints Heather Rubash as Chief Marketing Officer (September 18, 2025)
- CyberMaxx Appoints Anthony Cali as Chief Revenue Officer (September 16, 2025)
- Sectigo Appoints Sarabjeet Khurana as Country Manager for India & ASEAN (October 16, 2025)
- IP Fabric Appoints Petr Podrouzek as Chief Technology Officer (September 8, 2025)
Who to call at Open Systems, and when
A new leader at Open Systems brings new priorities and often new vendors. The first weeks are when they listen.
- An alert the day Open Systems raises, hires an executive or expands, scored against what you sell
- The decision-makers there, with verified emails
- Who you already know at Open Systems, from your own LinkedIn network
Works inside ChatGPT and Claude. Ask who to call at Open Systems. With Fundz connected, it knows.
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Fundz sees it the moment Open Systems changes its leadership, hires an exec or expands, usually minutes after it happens, and tells you who to reach.
Related People
Open Systems changed its leadership. Fundz had it the day it was filed, with the decision-maker at the company attached.
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