Deputy CISO - Operational Delivery

1GLOBAL; Lisboa; Presencial; EUR 120 000 - 160 000; Tempo integral

Vantagens oferecidas por esta oferta de emprego

Growth opportunities

Major transaction exposure

Work with a talented team

Dynamic work environment

Professional development

International experience

Open communication culture

Resumo da oferta

1GLOBAL is seeking a Deputy CISO to run its security function in a hands-on leadership role. You will be the day-to-day head of security, reporting to the CISO with a dotted line to the CIO, and you will lead the Cyber Defense organization across SOC, threat detection and response, incident response, and cloud security.

You will own incidents, drive compliance across multiple jurisdictions, and maintain a strong relationship with Engineering and Security to deliver secure telecom services

Qualificações

• 10+ years in cybersecurity with leadership experience in operational security.
• Proven incident command in production environments, preferably telecom.
• Strong track record delivering security programs across multi‑jurisdictional contexts.

Responsabilidades

• Lead the Cyber Defense team and manage daily security operations for a distributed telecom environment.
• Act as Incident Commander for major security incidents and maintain incident response playbooks.
• Oversee security tech stack: SIEM, SOAR, EDR/XDR, IAM/PAM, network and cloud security.
• Own telco security domains: core network protection, signalling security, 4G/5G, OSS/BSS security.
• Maintain security risk register, perform riskID/mitigation and supervise penetration tests.
• Guide Security Engineering: SDLC security, GSMA SGP compliance, architecture reviews.
• Approve changes to security platforms and represent Security in engineering changes.

Conhecimentos

Incident Commander

Cybersecurity leadership

Security operations

Telco security

Security governance

Security engineering

Ferramentas

SIEM

SOAR

EDR/XDR

IAM/PAM

Descrição da oferta de emprego

1GLOBAL is a technology-driven global mobile communications provider, delivering global connectivity solutions to enterprises and consumers. Powered by a best-in-class telecom platform with its own owned and operated global mobile core network in 15 countries, fully fledged in-house developed eSIM technology, and an extensive portfolio of telecom licenses; 1GLOBAL operates as a fully regulated telecommunications provider across 43 countries worldwide.

The company serves many of the world's leading banks, multinational enterprises, global retailers and digital-first businesses, including neo-banks, global fast moving consumer goods companies, travel leaders, and payment service providers. Today, 1GLOBAL connects more than 80 million people and devices globally, enabling our customers to launch, scale, and innovate with confidence in the mobile ecosystem.

1GLOBAL is a profitable, fast-growing business. With full-year revenues in 2025 exceeding US$200 million and profits of over US$25 million, we generate strong cash flows to fund our growth allowing us to continuously invest in infrastructure, platform innovation, and global expansion. In 2026 also the parent of the Lidl Group acquired a 10% interest in 1GLOBAL as part of a deal for Lidl to offer globally to its 180 million consumers communication services. Recent years have marked a defining phase in 1GLOBAL's journey, with major enterprise and mass-consumer client wins accelerating its evolution into a global mobile connectivity powerhouse, purpose-built to enable consumer brands to enter and succeed with their own aspirations to offer telecommunications services to their clients.

Founded in 2022 by experienced technology entrepreneurs, Hakan Koç and Pyrros Koussios, 1GLOBAL has rapidly emerged as a European technology leader shaping the future of global telecommunications. It operates as a fully regulated Mobile Virtual Network Operator (MVNO) in 15 countries and as a regulated telecom operator in an additional 28 markets. Headquartered in the Netherlands, with world-class R&D hubs in Lisbon, Berlin, and São Paulo, its team of close to 550 experts across 16 countries is united by a single ambition: to redefine global mobile connectivity through technology, scale, and execution excellence.

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, reportingdirectlyto the CISOwith a dotted line to the CIO.

You will lead theCyber Defenseorganisation(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 theCyber Defenseteam. Own daily operational security performance across a distributed, high-availabilitytelecomsenvironment.
• Serve as Incident Commander for significant security incidents. Maintain and continuously improve global incident response playbooks and readinessprogrammes.
• 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, referencearchitectures, and hardening guidelines globally.
• Own telco-specific security domains: network core protection,signallingsecurity (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-teamexercises;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.

About Us

1GLOBAL is a technology-driven global mobile communications provider, delivering global connectivity solutions to enterprises and consumers. Powered by a best-in-class telecom platform with its own owned and operated global mobile core network in 15 countries, fully fledged in-house developed eSIM technology, and an extensive portfolio of telecom licenses; 1GLOBAL operates as a fully regulated telecommunications provider across 43 countries worldwide.

The company serves many of the world's leading banks, multinational enterprises, global retailers and digital-first businesses, including neo-banks, global fast moving consumer goods companies, travel leaders, and payment service providers. Today, 1GLOBAL connects more than 80 million people and devices globally, enabling our customers to launch, scale, and innovate with confidence in the mobile ecosystem.

1GLOBAL is a profitable, fast-growing business. With full-year revenues in 2025 exceeding US$200 million and profits of over US$25 million, we generate strong cash flows to fund our growth allowing us to continuously invest in infrastructure, platform innovation, and global expansion. In 2026 also the parent of the Lidl Group acquired a 10% interest in 1GLOBAL as part of a deal for Lidl to offer globally to its 180 million consumers communication services. Recent years have marked a defining phase in 1GLOBAL's journey, with major enterprise and mass-consumer client wins accelerating its evolution into a global mobile connectivity powerhouse, purpose-built to enable consumer brands to enter and succeed with their own aspirations to offer telecommunications services to their clients.

Founded in 2022 by experienced technology entrepreneurs, Hakan Koç and Pyrros Koussios, 1GLOBAL has rapidly emerged as a European technology leader shaping the future of global telecommunications. It operates as a fully regulated Mobile Virtual Network Operator (MVNO) in 15 countries and as a regulated telecom operator in an additional 28 markets. Headquartered in the Netherlands, with world-class R&D hubs in Lisbon, Berlin, and São Paulo, its team of close to 550 experts across 16 countries is united by a single ambition: to redefine global mobile connectivity through technology, scale, and execution excellence.

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, reportingdirectlyto the CISOwith a dotted line to the CIO.

You will lead theCyber Defenseorganisation(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 theCyber Defenseteam. Own daily operational security performance across a distributed, high-availabilitytelecomsenvironment.
• Serve as Incident Commander for significant security incidents. Maintain and continuously improve global incident response playbooks and readinessprogrammes.
• 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, referencearchitectures, and hardening guidelines globally.
• Own telco-specific security domains: network core protection,signallingsecurity (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-teamexercises;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 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/Diametersignalling, 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.
• GSMAstandardsfamiliarity (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.RepresentsSecurity credibly at board and regulator level without the CISO in the room. Calmunderpressure. Deliversbad newsearly.

Benefits

Why 1GLOBAL?

• 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.