**Job Family:** Grid Software **Req ID:** 469890 At **Siemens Smart Infrastructure (SI)** , we’re shaping the future of intelligent and adaptive infrastructure. As part of our commitment to secure and sustainable energy systems, we design high-performance control technologies and cyber-resilient architectures for critical infrastructure. We are currently looking for an **IT System Architect and Product & Solution Security Expert** to strengthen our team at **Grid Software** in **Beersel** , supporting secure and resilient control systems for electrical power transmission for our clients. This role combines system design expertise with a strong focus on cybersecurity across the entire solution lifecycle. **Your tasks** + **Design** and **implement** Linux- and Windows-based IT systems for network control in critical energy infrastructure + **Define** operating systems configurations (Red Hat, VMware, Windows Server) tailored to project needs + **Configure** and **document** IS tools such as Veeam Backup, McAfee, and others + **Develop** and maintain firewalls and switches (Cisco, Fortinet, etc.) and support network segmentation + **Manage** system security including firewalls, group policy objects (GPO), patching and updates + **Evaluate** and respond to reported security vulnerabilities, assessing their impact and proposing mitigations + **Conduct** Factory Acceptance Testing (FAT) and Site Acceptance Testing (SAT) alongside customers + **Create** and **implement** concepts for long-term maintenance and lifecycle patch management + **Advise** customers on IT security best practices in critical infrastructure environments + **Collaborate** with internal stakeholders during bid, engineering, and maintenance phases to uphold cybersecurity standards **Your skills** + Degree in **Computer Science** or a related technical field + **5+ years** of experience in IT system architecture and cybersecurity + Proficiency in **script-based programming** (e.g. Bash) and **virtualization platforms** (e.g. ESXi) + Sound knowledge of **IT/OT network architectures** in industrial environments + Solid understanding of **cybersecurity principles** for critical infrastructure environments + Fluent in **French** , **English and Dutch.** + Experience with **cloud computing** and **containerized systems** + Basic knowledge of **project management methodologies** + Willingness to **travel** occasionally to our clients (e.g. France, Netherlands, Maghreb...) **You’ll benefit from** At Siemens, you will join an environment that cares about you. You get the opportunity to develop yourself in an international environment. We offer varied work in a wide range of positions and intensive internal training to further develop your career. Permanent coaching and guidance by a mentor are also part of the process. Furthermore, we offer: + At least **31 days of annual leave** + **Flexible working** conditions: 2 to 3 days a week of home working + **Benefits@work** : online store with additional benefits for Siemens employees + **Customized training programs** tailored to your career path + A **competitive salary** aligned with the Belgian labor market + A **financial care program** including pension, death & invalidity coverage + **Extended medical insurance** (hospitalization, outpatient care, dental & optical) + An **employee assistance program** focused on mental and physical well-being + And so much more! **Create a better #TomorrowWithUs! Apply now!** We value your unique identity and perspective and are fully committed to providing equitable opportunities and building a workplace that reflects the diversity of society. Come bring your authentic self and create a better tomorrow with us!