Administrador em Segurança da Informação | Linux – Sênior

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for an Administrador em Segurança da Informação | Linux – Sênior based in Brazil.

This is a senior-level opportunity focused on protecting and strengthening Linux environments within a critical technology infrastructure. You will play a key role in ensuring the availability, security, resilience, and continuous evolution of systems and services. The position combines security administration, vulnerability management, monitoring, incident response, and infrastructure hardening. You will work across areas such as access control, firewalls, encryption, SIEM, MFA, and security policies. The role also involves investigating incidents, supporting forensic analysis, and developing automated security controls and processes. You will contribute to resilient architectures and advanced strategies for threat prevention, detection, and recovery. The position offers a remote environment where technical expertise, autonomy, and a proactive security mindset are highly valued.

Accountabilities:: Configure and manage Linux security policies, including access controls, file permissions, firewalls, and privileged-user management.

Monitor Linux logs and SIEM alerts to identify suspicious activity, anomalies, vulnerabilities, and potential security incidents.

Apply security patches, updates, and hardening practices while ensuring systems remain aligned with internal security standards.

Conduct security and compliance audits, vulnerability assessments, file-integrity checks, and reviews of user privileges and segregation of duties.

Configure and maintain Linux security technologies, including iptables/UFW, SELinux/AppArmor, SSH, LDAP, encryption solutions such as LUKS, and MFA.

Document, investigate, and support the response to security incidents, including compromised Linux environments, malware, and other threats.

Perform forensic analysis when required to identify attack vectors, impacts, and opportunities for remediation.

Develop resilient and secure Linux architectures using network segmentation, load balancing, granular controls, and other measures to reduce attack surfaces.

Support advanced security testing and simulations to identify weaknesses and strengthen defensive controls.

Develop and maintain Bash, Python, or similar scripts to automate security activities such as containment, account management, and malware remediation.

Design and maintain ransomware prevention, detection, backup, recovery, and disaster-response strategies.

Prepare technical reports covering security posture, incidents, vulnerabilities, compliance, and performance indicators.

Collaborate with internal teams on security investigations, improvements, and other information-security initiatives as required.

Requirements:

Bachelor’s degree in Information Technology, Computer Science, Cybersecurity, or a related technology field.

Professional experience in information security and/or Linux environments, with experience demonstrable through formal employment or contractor documentation.

ITIL 4 training with a minimum workload of 12 hours.

Official ITIL 4 Foundation certification or higher.

Linux Professional Institute LPIC-3 Security certification.

At least 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) .

Strong practical knowledge of Linux security administration, access management, hardening, firewalls, vulnerability management, logging, and security monitoring.

Ability to investigate incidents, analyze security events, identify root causes, and recommend effective remediation measures.

Experience with scripting and automation, particularly using Bash and/or Python, is highly relevant to the role.

Strong analytical, problem-solving, documentation, and communication skills, with the ability to work independently in a senior-level security environment.

Benefits:

🏠 100% remote work model.

🏥 Health insurance through Hapvida, Bradesco, or Unimed, according to applicable regional collective bargaining terms.

🦷 Dental insurance through Hapvida Odonto or Bradesco Dental.

🍽️ Meal or food allowance.

🛡️ Company-funded life insurance.

💪 TotalPass.

💊 Pharmacy benefits.

🎓 Partnerships and discounts with educational institutions.

📚 Access to a corporate education platform.

👶 Welcome kit for new babies.

🧠 Access to the Moodar platform.

How Jobgether works: We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team. We appreciate your interest and wish you the best!  Why Apply Through Jobgether?    Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.     #LI-CL1