Senior Security Engineer (R&D and Secure Systems Engineering)

Nortal's Applied Defence R&D serves as an innovation engine, transforming complex defence challenges into validated, deployable solutions. By combining cyber resilience, AI, data science, embedded security, and digital engineering, we deliver mission-ready prototypes and architectures. Partnering with governments, armed forces, industry, and academia, we create sovereign IP, dual-use technologies, and NATO/EU-aligned innovations that reduce risk and accelerate capability delivery.

We are looking for a Senior Security Engineer to lead hands-on security engineering across our R&D projects. You will turn architecture, requirements, and risk findings into implemented, validated security controls, and mentor engineers along the way.

• Lead security engineering activities for complex systems, platforms, and R&D project components
• Translate security architecture, requirements, and threat models into implementable technical controls
• Design and implement security mechanisms across networks, operating systems, applications, and cloud environments
• Perform threat modelling, security risk analysis, hardening, and penetration testing
• Review system designs and configurations from a security perspective
• Lead resolution of complex security findings and support root-cause analysis
• Provide technical guidance and mentoring to engineers
• Author and co-author technical security content for R&D deliverables and reports

• Extensive hands-on experience in cyber security or secure systems engineering
• Strong knowledge of network, infrastructure, operating-system, application, and data security
• Experience designing and implementing security controls in complex or distributed systems
• Practical experience with security testing, vulnerability management, and hardening
• Understanding of cloud, virtualisation, containers, DevSecOps, PKI, and cryptography
• Experience leading technical security workstreams or mentoring engineers
• Willingness to complete a government security clearance process

Nice to have

• CISSP, OSCP, GIAC, or cloud security certifications are a plus

• We care about your growth & development. At Nortal, we support constant improvement and knowledge sharing
• We prioritize your health & well-being by providing a flexible package for health insurance and sports initiatives
• We support your work-life balance and provide flexible working hours
• It's your choice whether you want to work from the office or remotely within Estonia