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

Overview

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.

Key Responsibilities

• 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

Methods & Approaches

• Secure systems engineering and secure-by-design practices
• Threat modelling and risk-based security engineering
• Security testing, penetration testing, and validation methodologies
• DevSecOps and evidence-based security assurance

Deliverables

• Implemented and validated security controls and configurations
• Threat models, assessments, and validation reports
• Technical security designs and hardening documentationSecurity architectures and R&D deliverable sections

Skills & Experience

• 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
• CISSP, OSCP, GIAC, or cloud security certifications are a plus
• Willingness to complete a government security clearance process

Why Nortal?

• We hire people not only for their skills but also for cultural add. We live by our values: commit to delivering value and results, take ownership, empower yourself and others, and own your future and growth. Besides our professionalism, we like to spice things up with good humor
• 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

Salary range:

€4600-6500 gross/monthly (full-time).Final compensation will depend on factors such as relevant experience, role seniority, and skill set.

About Nortal

For over 25 years, we’ve been shaping digital transformation, delivering complex solutions for global enterprises and public sector organisations. Today, we are at the forefront of an AI-driven transformation era, helping organisations turn data into real business value. By combining deep domain expertise with data and AI, we design solutions that create immediate impact while scaling for the future.