Deputy CISO - Operational Delivery

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.

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. 

• 10+ years in cybersecurity; 5+ years in operational leadership (SecOps, Cyber Defense, Security Architecture). 

• Proven incident commander in a production environment, ideally in global telecoms or other distributed, high-availability infrastructure. 

• Deep familiarity with telco-specific security: network core protection, SS7/Diameter signalling, 4G/5G mobile network security, OSS/BSS, and cloud-native telecom environments. 

• Strong background implementing and managing enterprise security platforms at scale: SIEM, SOAR, EDR/XDR, IAM/PAM. 

• Direct operational experience with at least two of: GSMA SAS-SM, NIS2, GDPR, MiFID II, DORA. Audit evidence, notifications, certification cycles. 

• Experience leading hybrid internal/MSSP SOC models including MDR partner relationships. 

• Familiarity with Zero Trust, Secure-by-Design, and automation-centric security approaches. 

• GSMA standards familiarity (SGP.22, SGP.32, FS.18) is a strong advantage. Certifications such as CISSP, CISM, CCSP, or GCIH are a plus. 

• Builds trust with Engineering. Represents Security credibly at board and regulator level without the CISO in the room. Calm under pressure. Delivers bad news early. 

• Growth Opportunities: Advance your career in one of the fastest growing telecommunications companies, expanding over 50% year-on-year under the leadership of successful tech entrepreneurs.
• Major Transaction Exposure: Be in the driver’s seat for transactions that will have an impact on the future telco industry.
• Work with a Talented Team: From the Board and the Founders to the Senior Management Team, you will collaborate daily with the most capable and renowned external advisors and constantly being exposed to talented and driven individuals.
• Dynamic Work Environment: Thrive in a collaborative, fast-paced workplace where innovation is encouraged, and every contribution counts.
• Professional Development: Work alongside industry experts to enhance your skills and knowledge in a cutting-edge field.
• International Experience: Gain opportunities to work in different 1GLOBAL offices around the world as you grow within the company.
• Open Communication Culture: Join a team where your ideas are heard, and open dialogue is encouraged, fostering a supportive and transparent work environment.
• Get Things Done Attitude: Be part of a results-driven team that values efficiency, creativity, and the drive to make a tangible impact in the industry.

1GLOBAL is an equal opportunity employer, we value your character as much as your talent. Diversity drives our innovation, and we offer a collaborative, dynamic, and international work environment. We are excited for you to join our mission to revolutionise connectivity globally.