Information Security Administrator | Linux – Senior

Ensure the continuity, security, and evolution of the information technology infrastructure, guaranteeing that physical and logical resources are always available, up-to-date, and aligned with the organization’s operational needs through efficient, proactive, and innovative management. - Configure and manage security policies on Linux operating systems, including access control, file permissions, and firewall settings; - Monitor event logs on Linux servers and workstations to identify suspicious or anomalous activity; - Apply patches and security updates to Linux systems in accordance with established guidelines; - Implement hardening practices on Linux servers and workstations, in line with the organization’s security standards; - Conduct periodic compliance audits on Linux systems, verifying adherence to internal and regulatory security policies; - Evaluate user permission and privilege configurations on Linux systems to identify deviations or excessive access; - Document security incidents related to the Linux environment and propose technical recommendations for mitigation; - Collaborate with internal teams in investigating incidents involving Linux systems; - Prepare technical reports on the security status of Linux systems and performance metrics of the tools used; - Configure and maintain firewalls and other security tools on Linux systems, such as iptables and UFW (Uncomplicated Firewall); - Perform periodic scans to detect vulnerabilities on Linux servers and workstations; - Conduct integrity audits of critical files and log systems in Linux environments; - Evaluate the use of privileged accounts and the segregation of duties on Linux systems during audits; - Implement and manage data encryption solutions on Linux systems, such as LUKS (Linux Unified Key Setup), to protect sensitive information; - Evaluate and configure application control policies (SELinux/AppArmor) to prevent the execution of unauthorized software; - Monitor and respond to security alerts generated by SIEM (Security Information and Event Management) tools specific to Linux environments; - Implement and monitor security policies to protect critical services, such as SSH, LDAP, and databases on Linux systems; - Perform forensic analysis on compromised Linux systems to identify attack vectors and impacts; - Evaluate and implement multi-factor authentication (MFA) solutions in Linux environments; - Develop resilient and secure architectures for Linux systems, including network segmentation, load balancing, and the implementation of granular controls to minimize attack surfaces; - Conduct simulations of advanced attacks, such as exploiting zero-day vulnerabilities, privilege escalation techniques, and lateral movement, to identify flaws and propose robust improvements; - Create and maintain custom scripts (in Bash, Python, or other languages) to automate tasks such as containing compromised endpoints, disabling suspicious accounts, and removing malware; - Design and implement advanced strategies for the prevention, detection, and recovery from ransomware attacks, including immutable backups, rapid restoration of critical systems, and regular disaster scenario simulations; - Perform other activities related to information security and Linux environments, as required by the operation. ## Education · Bachelor’s degree in Information Technology (IT). ## Professional Experience · Experience in information security or Linux environments. Experience must be demonstrated through a corporate employment contract or Work Permit, both of which must include start and end dates for the position. CERTIFICATIONS/COURSES/TRAINING: · ITIL 4 training, with a minimum duration of 12 (twelve) hours. · Official ITIL 4 Foundation certification or higher · Linux Professional Institute (LPIC-3) Security certification. Must hold one of the following certifications: ◦ ECSA (EC-Council Certified Security Analyst) or ◦ CySA+ (CompTIA Cybersecurity Analyst) or ◦ ECIH (EC-Council Certified Incident Handler) or CSIH (Certified Specialist Incident Handler). Additional Information Our benefits: Hapvida, Bradesco, or Unimed health insurance (based on regional collective bargaining agreement rates); Hapvida Odonto or Bradesco Dental dental insurance; Food or meal vouchers; Life insurance fully covered by Lanlink; Totalpass; Pharmacy discount program; College discount program; Corporate education platform; “Welcome to the World, Baby” kit; Moodar platform.

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