Dennis Monner

CEO Open Systems | Scaling a $500M+ Autonomous Cyber Platform | Led $100M US business | Europe ↔ US market entry & scale | Founder of 2 Gartner MQ-Listed Companies | GTM Expert | AI First

Zurich, Zurich, Switzerland

About

CEO with 25+ years of experience building, scaling, and transforming cybersecurity and SaaS companies in US and Europe. Track record includes founding and scaling companies to 100%+ ARR growth over multiple years, with two successful exits of cybersecurity firms listed in the Gartner Magic Quadrant. I operate at the intersection of strategy, go-to-market execution, and product — with a clear focus on turning complex technology into scalable, revenue-generating platforms. Core strengths: • Scaling ARR from early stage to $100M+ • Building high-performance global sales organizations (US, EMEA, APAC) • Enterprise B2B and B2B2X sales (telcos, providers, large enterprises) • Go-to-market strategy, pipeline build-up (4–6x), and execution discipline • Cybersecurity, SASE, Zero Trust, and subscription-based models • Driving product-market fit and translating technology into commercial success I have led international expansion, built global partner ecosystems, and consistently entered competitive markets against established global players. My approach is execution-driven: clear ownership, high accountability, and focus on measurable results. I specialize in situations that require transformation — scaling companies, rebuilding go-to-market organizations, and unlocking growth in complex, regulated environments. Selected achievements: • Built and led international sales organizations delivering >100% ARR growth over multiple years • Founded and exited two cybersecurity companies listed in the Gartner Magic Quadrant • Achieved global market positioning and competitive parity with top-tier vendors • Expanded business across US, EMEA, and APAC markets • Drove development and commercialization of cybersecurity platforms (including SASE and next-generation network security) Focus: building, scaling, and leading high-performance technology companies.

Experience

  • Chief Executive Officer at Open Systems
    Oct 2025 - Present · 10 mos

    Transforming Open Systems into a scalable, platform-driven cybersecurity company. We are building a $500M+ sovereign cybersecurity platform, combining network and security into a fully managed SASE model. In a market shaped by AI-driven threats, increasing regulation, and rising data sovereignty requirements, buying more tools is no longer the answer. Security must be operated, not assembled. Open Systems delivers a fundamentally different model: direct access to senior engineers (no L1/L2 handoffs), a fully operated security platform, and deep integration of network and security. As CEO, I lead a full transformation across go-to-market, product, and operating model. Key focus areas: • Rebuilding global go-to-market and sales execution across US and EMEA • Increasing pipeline coverage (4–6x) and strengthening enterprise sales (9–18 month cycles) • Driving product modernization and integrating AI into core security operations • Scaling a platform-based operating model to break linear, headcount-driven growth • Strengthening positioning in SASE, Zero Trust, and Managed Security • Building a high-performance, execution-driven organization Our ambition is clear: Position Open Systems as one of Europe’s leading sovereign cybersecurity platforms, combining SASE, MDR, Zero Trust, and AI-driven security operations. Focus: execution, scale, and category leadership.

  • Aryaka (Full-time · 2 yrs 11 mos)
    • Chief Commercial Officer
      Feb 2021 - Dec 2023 · 2 yrs 11 mos

      - United 3 executive departments (sales, marketing, and sales operations) under one leadership for ensuring smooth sales and marketing operations, with targeting added value to double ARR within Aryaka® - Solved organizational challenges, rebuilt entire divisions, created management structures to align sales, marketing, and operation efforts globally, and enabled rapid growth trajectory. - Delivered predictability to sales teams with disciplined sales procedures. - Established a lead generation process to triple sales pipeline and meet defined sales targets globally. - Optimized investments across a full multi-channel and go-to-market organization; spearheaded the complexity of multiple channels and the inherent channel conflict. - Facilitated the enlargement of the existing portfolio and significantly contributed to Aryaka’s ability to compete and win large deals while delivering the industry’s most flexible managed SD-WAN and SASE solution experience. - Brought a strengthened team and strong, pioneering technology to integrate with Aryaka’s cloud-first, SD-WAN - Reinforced Aryaka’s brand reputation by delivering the industry’s best customer experience and creating highly differentiated offerings, such as a converged managed SD-WAN and SASE solution based on the company’s cloud-first architecture for enterprise customers. - Applied deep insight to key strategic issues; generated ideas and creative frameworks; and used a combination of facts, judgment, and personal impact to build credibility and influence outcomes.

    • Managing Director - Cyber security devision
      Feb 2021 - May 2023 · 2 yrs 4 mos

  • Founder & Experience Creator at WYND Yachting
    Jan 2021 - Dec 2023 · 3 yrs

    Three years ago, I found myself on a super yacht, kite surfing off its deck—a first for me. At the time, I was simply looking for a way to reset my mind and improve my sleep. What I didn’t expect was how profoundly this experience would shift my perspective. I’m selective about the company I keep, and the thought of sharing a 170 feet yacht with strangers felt, at first, out of my element. But as the days went by, I realized this wasn’t just a trip—it was an experience that changed how I saw the world. Being surrounded by the open sea, immersed in nature, and pushing myself to try new things gave me clarity I hadn’t felt in years. It struck me: why should such transformative experiences remain out of reach for most people unless they own a yacht or spend millions chartering one? This realization became the foundation of Wynd Apartments. Wynd isn’t about yachts—it’s about something much rarer: creating a lifestyle most only dream about, without the barriers of excessive costs or exclusivity. It’s for those who believe the finest luxuries are those that elevate your mind and soul. For me, this is more than a project; it’s a way of sharing a life-changing perspective with those who appreciate that some things can’t be bought—they must be experienced.

  • Venture Capital - CEO & Founder at MD Capital GmbH
    2000 - Feb 2022 · 22 yrs 2 mos

  • CEO & Founder | Secucloud, Cyber Security (SaaS) at Secucloud
    Feb 2013 - Mar 2021 · 8 yrs 2 mos

    A cyber deep tech SASE platform and an Aryaka company | Cyber Security - SASE, SECaaS, FWaaS, SD-WAN, SWG, CASB - Pioneered exponential corporate growth from an embryonic startup to a flourishing global company with 70+ employees. ▶︎▶︎ Earned three time Gartner® Hype Cycle listing. - Formulated company’s values by successfully launching and nurturing pivotal strategic and operational projects as well as a viable corporate framework, including policies, programs, departments, and cross-functional teams. - Achieved association with Gartner and enhanced company capital through efficient fundraising. - Embedded an outstanding enterprise-grade SASE cybersecurity platform with elastic scaling and ECS2 into the cloud and ensured its availability for B2B and B2B2x markets globally. - Created a global distribution network of over $8M TCV via white label/OEM partners such as Symantec, Kaspersky, and F-Secure. - Built a new B2B2x market for consumer mobile cybersecurity through international tenders with Tier 1 ISPs such as Deutsche Telekom Group, Axiata Group, and Ooredoo Group. - Leveraged global growth for over 800,000 active mobile licenses and stabilized line consumer and SME markets, attaining significant boosts in revenue and profitability. - Spearheaded company success by raising over $18M in both industry and private equity. - Provided mobile consumers and SMEs with a patented, highly scalable, and low-TCO SASE and Firewall-as-a-Service platform via product development on a dual-track business plan. - Established a nearshore operations unit in Romania and streamlined operations by formulating and executing cloud strategy and agile product development. - Fostered congenial relationships with distributors by planning and implementing a two-tier sales network covering the U.S., Europe, the Middle East, South Africa, India, and the APAC region.