Senior Network Security Engineer

Santex is a global Certified B technology company as well as one of North America's fastest-growing companies, according to the Inc. 5000. It’s present in 18 countries and over 100 cities, and headquartered in Argentina with offices in the United States, Mexico, and Peru.

Its two service lines - AI Tech Consulting and AI-Optimized Engineering - help organizations comprehensively adopt technology, expand their capabilities, and improve business outcomes at scale.

The same approach defines its culture: Santex has 80.4% employee engagement (global average: 21%), 8% annual turnover (tech sector: 20-25%), 9,369 training hours invested in 2025 - more than double the global average -, and a 26.5% year-over-year reduction in carbon footprint, achieving carbon neutrality through offsetting.

Santex. A company with purpose and judgment. Yes, it's possible.

We are an Equal Opportunity Employer and are committed to fostering an inclusive and diverse workplace. We do not discriminate on the basis of race, color, religion, sex, gender identity or expression, sexual orientation, national origin, age, disability, veteran status, genetic information, or any other characteristic protected by applicable law. All qualified applicants will receive consideration for employment without regard to any of these factors. We strongly encourage candidates from all backgrounds to apply.

Job Description: 

Network Security Engineer 

Role Overview

We are looking for a Network Engineer. The ideal candidate will play a key role in protecting our infrastructure, ensuring the confidentiality, integrity, and availability of data, and supporting the company’s security strategy through the implementation and monitoring of advanced network security solutions.

Responsibilities

• Manage and troubleshoot web filtering policies (Zscaler, Cisco Umbrella, etc.).
• Resolve complex networking issues and support network architecture/design.
• Monitor network health in a NOC-style environment.
• Assist with SIEM and WAF platforms (optional but a plus).

Requirements

• 3+ years of experience as a Network Security Engineer or Network Infrastructure Engineer.
• Proven expertise as a Zscaler SME, with hands-on experience in ZIA and ZPA design, deployment, and troubleshooting.
• Strong experience in SIEM operational environments and network security monitoring.
• Deep knowledge of core networking fundamentals: DNS, routing protocols, subnets, and network architecture/design.
• Hands-on experience managing enterprise network security tools (Firewalls, VPNs).
• Proven ability to troubleshoot complex web filtering policies and network connectivity failures.
• Experience working in Tier 3 support roles or NOC monitoring environments.

Advanced English

• Excellent verbal and written English communication skills