Senior Information Security Administrator

This is a fully remote position, open to applicants in Brazil.

📋 Description

• Guarantee the ongoing operation, security, and enhancement of the information technology infrastructure.

• Ensure that both physical and logical resources are accessible, current, and aligned with operational requirements.

• Set up and oversee security policies on Linux operating systems, including access control, file permissions, and firewall configurations.

• Monitor event logs on Linux servers and workstations to detect any suspicious or abnormal activity.

• Apply security patches and updates to Linux systems as necessary.

• Implement hardening methodologies on Linux servers and workstations.

• Conduct regular compliance audits on Linux systems.

• Review user permissions and privileges on Linux platforms.

• Document security incidents and recommend technical mitigation strategies.

• Collaborate on investigations related to incidents involving Linux systems.

• Prepare technical reports regarding the security and performance metrics of Linux systems.

• Configure and maintain firewalls and tools such as iptables and UFW.

• Execute vulnerability scans.

• Conduct integrity audits of critical files and logs.

• Assess privileged accounts and implement segregation of duties.

• Implement and manage data encryption using LUKS.

• Evaluate and configure application control policies with SELinux/AppArmor.

• Monitor and respond to alerts from SIEM tools.

• Implement and oversee security policies for SSH, LDAP, and databases.

• Perform forensic analysis on compromised Linux systems.

• Evaluate and implement multi-factor authentication (MFA).

• Develop resilient and secure architectures, including network segmentation, load balancing, and granular controls.

• Conduct simulations of advanced attacks, zero-day vulnerability exploitation, privilege escalation, and lateral movement.

• Create and maintain scripts in Bash, Python, or other languages for security automation.

• Design and implement strategies for ransomware prevention, detection, and recovery.

• Carry out other information security and Linux environment-related tasks as required by operational needs.

⛳️ Requirements

• Bachelor's degree in Information Technology (IT) or a related discipline.

• Experience in information security or Linux environments.

• Experience must be evidenced by a contractor agreement (Pessoa Jurídica) or an employment record (Carteira de Trabalho) showing the start and end dates for the activity.

• ITIL 4 training with a minimum duration of 12 hours.

• Official ITIL 4 Foundation certification or higher.

• Linux Professional Institute LPIC-3 Security certification.

• One of the following certifications: ECSA (EC-Council Certified Security Analyst), CySA+ (CompTIA Cybersecurity Analyst), ECIH (EC-Council Certified Incident Handler), or CSIH (Certified Specialist Incident Handler).

🏝️ Benefits

• Health plan: Hapvida, Bradesco, or Unimed (according to regional collective bargaining agreement — CCT — rates).

• Dental plan: Hapvida Odonto or Bradesco Dental.

• Meal or food allowance.

• Life insurance fully covered by Lanlink.

• Totalpass.

• Pharmacy partner program.

• University partnership program.

• Corporate learning platform.

• Newborn welcome kit.

• Moodar platform.