We are looking for a **Systems Administrator** to join our team in **Barcelona**. Reporting to the CFO, you will be responsible for maintaining and improving Aimsun’s IT infrastructure and delivering high\-quality support to internal users. **Responsibilities:** * Ensure the smooth operation of managed systems and services * Manage and secure Aimsun’s IT infrastructure (on\-premises and cloud) * Implement and promote best practices in IT and cybersecurity * Provide technical support to employees across platforms * Oversee perimeter and identity security * Coordinate with suppliers and contractors on IT\-related matters * Ensure compliance with information security, environmental, and workplace safety standards * Lead and maintain ISO 27001 certification and ongoing compliance * Conduct security audits, penetration testing, and incident response * Manage SSL/TLS certificates and other security assets * Contribute actively to process improvements and IT strategy * Respond to security incidents and assessments * Adopt and maintain policies, processes, guidelines, procedures, instructions relevant to the work and workplace **Must\-haves:** * Bachelor’s degree in computer information systems or related field * Strong knowledge of on\-premises and cloud computing, networking and cyber security * 3\-5 years IT experience * Microsoft 365 administration skills * Experience in on premise and cloud\-based infrastructure management * Windows, Linux and macOS experience * Basic coding/scripting skills * Proven knowledge of ISO 27001 implementation and compliance * Fluency in professional written and spoken English and Spanish * Ability to work autonomously, proactively and thoroughly * Strong analytical / problem solving skills * Service orientation, flexibility, dynamic attitude