**Mandatory job requirements:** * Bachelor's degree in Systems Analysis, Computer Engineering, Computer Science, or related fields; * Senior experience in security infrastructure and deployment of security solutions and corporate systems; * Certifications in Firewall products: * Certification in Linux Operating Systems; * CompTIA Security\+ certification; * ITILv3 Foundation or higher; **Required knowledge, skills, and attitudes to perform the role:** * Knowledge in analysis and control of threats and attacks on corporate networks; * Handling service tickets in ITSM tools following ITIL best practices; * Excellent written and verbal communication skills, with clarity and objectivity; * Ability to accurately and thoroughly document procedures and technical reports; * Ability to work proactively and independently, efficiently managing priorities and deadlines; * Strong analytical and problem-solving profile, focused on results; * Collaborative spirit and teamwork, maintaining positive relationships with colleagues and stakeholders; * Ability to adapt to changes and handle pressure situations calmly and effectively. **Main job responsibilities:** * Operation of Linux, Unix\-like, and Windows systems; * Scripting with Python and Shell Bash, using regular expressions; * Administration of network security infrastructure, such as Firewalls, VPN, IPS, and Web Secure Gateways; * Management of digital certification infrastructure through HSM; * Advanced knowledge of cryptography and hash algorithms.