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Mid-level Information Security Analyst – Detection, SIEM, Perimeter, NGFW
Location
Brazil
Posted
4 days ago
Salary
0
Seniority
Senior
Job Description
Mid-level Information Security Analyst – Detection, SIEM, Perimeter, NGFW
Portobello
• Operate and support the maintenance of the SIEM platform, ensuring correct collection of log sources, and the integrity and quality of received data. • Support the creation, review and fine-tuning of detection rules and use cases to reduce false positives and optimize alerts. • Operate and administer Next-Generation Firewalls (NGFW): controlled implementation of access rules, NAT, VPNs, justification documentation, and periodic review of orphaned rules. • Actively support network segmentation activities, traffic rules, and perimeter hardening. • Monitor, classify and investigate security alerts generated by the SIEM, firewalls and other perimeter tools. • Perform triage and initial analysis of perimeter security incidents, carrying out structured escalation to a Specialist when necessary. • Produce operational reports, traffic maps and indicators of security incidents/blocks. • Create and keep up-to-date technical documentation of topologies, network flows and operational procedures (SOPs).
Job Requirements
- Professional experience in Information Security, Networking, IT Infrastructure or related fields with a focus on security.
- Hands-on experience in monitoring, log triage and routine operation of SIEM platforms.
- Experience in operating and administering Next-Generation Firewalls (Check Point, Palo Alto, Fortinet or equivalents).
- Solid practical knowledge of TCP/IP networking, routing, network segmentation (VLANs, DMZs) and communication protocols.
- Knowledge of detection rules, event correlation and log header analysis.
- Familiarity with Windows and Linux environments.
- Proven technical analysis skills and diligence in documenting activities.
- Strong analytical ability, attention to detail and investigative mindset.
- Organization and discipline to follow Change Management processes.
- Good communication skills for interacting with infrastructure, telecom teams and external partners.
- Proactivity and interest in continuous technical development in SecOps.
- Specific experience with Wazuh, Elastic Stack (ELK) or other open-source SIEM platforms.
- Practical knowledge of detection rules mapped to the MITRE ATT&CK framework.
- Basic understanding of Identity and Access Management (IAM) and Active Directory structure.
- Knowledge of ISO/IEC 27001 and CIS Controls frameworks.
- Basic scripting skills (Python, Bash or PowerShell) for automating log analysis.
- Entry-level security or networking certifications (e.g., Security+, CCNA, NSE 4 Fortinet, CCSA Check Point).
Benefits
- Life insurance;
- Health and dental plans;
- Portobello Corporate University platform;
- Profit Sharing (PPR);
- Discounts at local pharmacies;
- Private pension plan;
- Union membership;
- Discount network – partnerships with various educational institutions;
- Discounts on Portobello product purchases;
- Vacation bonus;
- 'Portobello Mom' allowance – for baby layette purchases;
- Nursery assistance;
- Support for dependents with disabilities (PCD);
- Professional training and development programs;
- Wellhub and many more!!!
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