Black & Grey HR is recruiting for an established technology solutions and services provider. Our client is looking for an experienced Senior Network Security Engineer to implement, maintain, and continually strengthen the security controls that protect the organization's network infrastructure. The role leads security operations and the handling of complex incidents, ensures alignment with recognized industry standards and best practices, and works closely with cross-functional teams to defend systems, services, and data against evolving threats.

Key Responsibilities
Security Operations & Incident Response
- Lead the investigation and remediation of advanced security incidents, intrusions, and vulnerabilities.
- Carry out threat analysis, log correlation, and forensic review using logging and monitoring tools.
- Deploy and maintain network security systems and technologies, including firewalls, WAF, proxy systems, email gateways, packet shapers, and other security platforms. Security Hardening & Compliance
- Run regular vulnerability assessments, coordinate penetration testing, and plan remediation activities.
- Ensure alignment with standards and frameworks such as ISO 27001, NIST, CIS Benchmarks, and GDPR.
- Conduct risk assessments and recommend improvements across network, cloud, and hybrid environments. Security Access Control Management
- Manage and optimize firewall rule sets,



security policies, and web filtering systems.
- Oversee VPN technologies (IPSec and SSL), network segmentation, and zero-trust access models.
- Implement secure authentication and identity-based access control solutions. Automation & Operational Efficiency
- Automate routine security tasks and operations.
- Integrate security tools wherever appropriate to improve visibility and response.
- Strengthen processes for monitoring, patching, change control, and reporting. Requirements
- 6–10+ years of experience in network security engineering or a closely related role.
- Bachelor's degree in Computer Science, Cyber Security, Information Technology, or a related field.
- Strong hands-on experience with enterprise firewalls such as Palo Alto, Fortinet, Cisco ASA/Firepower, and Check Point.
- In-depth knowledge of routing and switching, TCP/IP, DNS, DHCP, WAF, and SD-WAN.
- Solid understanding of encryption, PKI, VPNs, and authentication protocols.
- Experience implementing Zero Trust Network Architecture, along with proxy, packet shaper, and email gateway solutions. Certifications
- Vendor-specific certifications: Palo Alto PCNSE, Fortinet NSE4–NSE7, or Cisco CCNP Security.
- Certified Ethical Hacker (CEH). Benefits
- ​Competitive Salary + Benefits Package.

📌 Senior Network Security Engineer (Salta)
🏢 Black & Grey HR
📍 Salta