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Lanlink Informática Ltda. logo
Lanlink Informática Ltda.

Tecnologias que transformam

Information Security Administrator – Senior Firewall

Security EngineerSecurity EngineerFull TimeRemoteSeniorTeam 501-1,000Since 1988H1B No SponsorCompany SiteLinkedIn

Location

Brazil

Posted

66 days ago

Salary

0

Seniority

Senior

Bachelor DegreePortugueseCyber Security

Job Description

Information Security Administrator – Senior Firewall

Lanlink Informática Ltda.

• Configure and manage security policies on the firewall, including access rules, traffic filtering, and application control; • Implement and fine-tune firewall rules, defining granular policies aligned with security guidelines and periodically reviewing them to eliminate redundancies or inconsistencies; • Continuously analyze implemented rules to identify obsolete or misconfigured entries, record justifications, and document all changes made to the environment; • Evaluate the impact of rules on critical applications, adjusting them to avoid unintended blocks or network bottlenecks while monitoring the performance of protected services; • Configure specific rules for application and service filtering based on the firewall App-ID, allowing authorized traffic and mitigating risks associated with untrusted applications; • Monitor firewall logs and events to identify suspicious or anomalous activity; • Apply firmware updates and threat signature updates to the firewall according to established guidelines; • Implement hardening practices on the firewall in line with the organization’s security standards; • Perform periodic audits of firewall configurations to verify compliance with internal and regulatory security policies; • Evaluate and adjust NAT (Network Address Translation) and routing configurations on the firewall to ensure correct network operation; • Document security incidents related to the firewall and propose technical recommendations for mitigation; • Collaborate with internal teams in the investigation of incidents involving the firewall; • Prepare technical reports on the firewall security status and performance metrics of implemented policies; • Configure and maintain advanced firewall features such as IPS (Intrusion Prevention System), Threat Prevention, and WildFire; • Conduct periodic scans to detect vulnerabilities in firewall configurations using dedicated tools; • Perform integrity audits of firewall rules and logging systems (logs) within the firewall environment; • Assess the use of privileged accounts and segregation of duties in firewall management during audits; • Implement and manage multifactor authentication (MFA) solutions for firewall access; • Evaluate and configure SSL/TLS traffic control policies on the firewall to prevent encryption-based attacks; • Monitor and respond to security alerts generated by the firewall and integrated with SIEM (Security Information and Event Management) tools; • Configure and manage site-to-site and remote access VPN policies using the firewall’s VPN tools, defining granular rules for authentication and access control based on the environment’s needs (Host Information Profile, split-tunnel traffic, etc.); • Configure segmentation rules for VPN traffic on the firewall, isolating critical networks and limiting lateral access to reduce the spread of threats from remote connections; • Implement SSL/TLS inspection policies for VPN traffic, enabling analysis of encrypted packets without compromising VPN security or performance; • Implement and monitor security policies to protect critical services such as site-to-site and remote access VPNs on the firewall; • Configure and manage access policies based on the Zero Trust Network Access (ZTNA) model; • Monitor and audit access performed via ZTNA; • Perform other information security and firewall-related activities as required by operations.

Job Requirements

  • Bachelor's degree in Information Technology (IT) or related field.
  • Experience in information security or firewall environments. Experience must be demonstrated via a legal contractor (Pessoa Jurídica) contract or Work Record (Carteira de Trabalho), which must include start and end dates for the activity.
  • ITIL 4 training with a minimum duration of 12 (twelve) hours.
  • Official ITIL 4 Foundation certification or higher.
  • Hold an advanced firewall engineer or next-generation firewall professional certification issued by the firewall manufacturer.
  • Hold one of the following certifications:
  • ◦ ECSA (EC-Council Certified Security Analyst) or
  • ◦ CySA+ (CompTIA Cybersecurity Analyst) or
  • ◦ ECIH (EC-Council Certified Incident Handler)

Benefits

  • Health plan: Hapvida, Bradesco Saúde, or Unimed (depending on local availability);
  • Dental plan: Hapvida Odonto or Bradesco Dental;
  • Food or Meal Voucher (Alelo);
  • Life insurance fully paid by Lanlink;
  • Transportation allowance;
  • Pharmacy discount program;
  • University tuition discount agreements;
  • Total Pass (transportation card);
  • Internal education platform;
  • Moodar platform (therapy platform)

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