Cyber Security Engineer - Air Traffic Management

Thales; Oeiras; On-site; EUR 42,000 - 70,000; Full time

Job summary

Thales in Portugal is seeking a Cyber Security Engineer to analyze security requirements, design high-level architectures, and lead security component development across multidisciplinary teams.

You will ensure compliance with major cybersecurity frameworks and support accreditation and certification processes, with opportunities to travel as needed. English proficiency is mandatory, and a degree in Cybersecurity or related field is required.

Qualifications

• Degree in Engineering, Computer Science or related discipline majoring in Cybersecurity.
• 3+ years of proven experience in the Cybersecurity field.
• Strong knowledge of Cybersecurity solutions and architecture design.

Responsibilities

• Analyze security requirements and constraints to develop high-level, compliant security architectures.
• Lead design and development of security components such as SIEM, IAM, gateways, and detection systems.
• Coordinate security efforts across multidisciplinary teams and support accreditation processes.

Skills

Cybersecurity

Security architecture

Threat modelling

Vulnerability management

English proficiency

Education

Engineering/CS degree in Cybersecurity

Tools

SIEM

IAM

PAM

EDR

Firewalls

Job description

Location: Paço de Arcos - Q45, Portugal

For more than 35 years, Thales acts in Portugal for global Defense and Aerospace markets and promotes and delivers innovative solutions that enhance its customer’s critical systems´ security, on land, sea, air, space and cyberspace, through a technical team of excellence.

If you want to be part of Thales in Portugal and have experience as a Cyber Security Engineer, this is the right opportunity for you!

Responsibilities:

• Analyze security requirements and constraints to develop high-level, compliant security architectures;
• Lead the design and technical development of security components such as SIEM, IAM, gateways, and detection/deception systems;
• Ensure architectural solutions align with business policies and major cybersecurity frameworks (e.g. NIST, ISO);
• Conduct risk assessments, study alternative solutions, and justify architectural choices;
• Coordinate technical security efforts across multidisciplinary teams;
• Produce architecture and engineering reports, specifications, and documentation to support accreditation and certification processes;
• Collaborate with cyber suppliers and vendors to assess and select appropriate security products;
• Support pre-sale and sales activities by providing cybersecurity expertise for bids and proposals;
• Translate customer security requirements into actionable delivery plans.

What We’re Looking For:

• Degree in Engineering, Computer Science or related discipline majoring in Cybersecurity;
• 3+ years of proven experience in the Cybersecurity field;
• Strong knowledge in Cybersecurity solutions (e.g. IAM, PAM, SIEM, EDR, Keys, Firewall), architecture design and integration;
• Knowledge of Systems Engineering Lifecycle and relevant standards (eg. ISO/IEC15288);
• Experience in vulnerability management and threat modelling;
• Sound judgement and independent decision‑making capability where necessary;
• Very good written and oral proficiency in English (mandatory)
• Availability to travel abroad.

Nice to Have:

• Postgraduate studies in Cybersecurity;
• Cyber Industry qualifications (e.g. CISSP, CompTIA Security+, CCNA Security, GIAC, SABSA or similar);
• Experience in system hardening and hardening review based on CIS Benchmarks or DISA STIG frameworks;
• Knowledge of ISO 27001 foundational requirements;
• Experience in ATM Domain and related standards (eg. ICAO, Eurocontrol , or safety critical systems).

The Group invests more than €4.5 billion per year in Research & Development in key areas, particularly for critical environments, such as Artificial Intelligence, cybersecurity, quantum and cloud technologies.

In 2025, the Group generated sales of €22.1 billion.

For our more than 85,000 employees in 65 countries we open up visionary perspectives, realise individual career paths and enable creative freedom. This is achieved with courage, versatility and the firm intention to make the demanding challenges of our time safer and more inclusive. With our sustainable value‑focused management we support diversity actively.