Deputy CISO - Operational Delivery

About Us 1GLOBAL is a technology-driven global mobile communications provider helping enterprises and consumer brands deliver seamless connectivity worldwide. Powered by a best-in-class telecom platform, proprietary eSIM technology, and its own mobile core network across 15 countries, 1GLOBAL operates as a fully regulated telecommunications provider in 43 countries. Founded in 2022, 1GLOBAL has rapidly become one of Europe's fastest-growing telecom technology companies, connecting more than 80 million people and devices globally. Our customers include leading banks, multinational enterprises, global retailers, travel companies, payment service providers, and digital-first businesses. Headquartered in the Netherlands, with R&D hubs in Lisbon, Berlin, and São Paulo, 1GLOBAL employs over 550 professionals across 16 countries. With annual revenues exceeding US$200 million and a strong track record of profitability, we continue to invest in innovation, infrastructure, and international expansion as we redefine the future of global mobile connectivity. About the Role The Deputy CISO runs 1GLOBAL's security function. This is an operational leadership role: you are the day-to-day head of security, reporting directly to the CISO with a dotted line to the CIO. You will lead the Cyber Defense organisation (SOC, Threat Detection and Response, Incident Response, Vulnerability Management, Security Engineering). You will command incidents, own compliance execution across a multi-jurisdictional regulatory environment, and hold the Engineering-Security relationship together. The CISO owns governance and board accountability. You own delivery. About the Responsibilities Lead the Cyber Defense team. Own daily operational security performance across a distributed, high-availability telecoms environment. Serve as Incident Commander for significant security incidents. Maintain and continuously improve global incident response playbooks and readiness programmes. Oversee the design, deployment, and lifecycle management of critical security technologies: SIEM, SOAR, EDR/XDR, IAM/PAM, network security, and cloud security platforms. Maintain technical standards, reference architectures, and hardening guidelines globally. Own telco-specific security domains: network core protection, signalling security (SS7/Diameter), mobile network security (4G/5G), OSS/BSS security, and cloud-native telecom environments. Own the security risk register day-to-day. Lead technical risk identification, quantification, and mitigation. Oversee penetration tests and red-team exercises; ensure findings are remediated promptly. Oversee Security Engineering: architecture review process, SDLC security, GSMA SGP compliance in product delivery. Ensure security is embedded in designs across Network Engineering, Cloud, IT, and Product. Approve operational security platform changes. Represent Security in the Engineering change process. Requirements About You 10+ years in…