Senior Information Security Engineer – Enterprise Security Platforms

Job Description

Senior Information Security Engineer | Lumen Technologies

The Tone:
This is a full-time role at Lumen Technologies, located in Bengaluru, Karnataka, India. Lumen is a trusted network provider that connects people, data, and applications through its fiber network, enabling secure and high-performance connectivity for AI workloads. This role is critical for building infrastructure customers rely on, focusing on performance, security, and resilience in a high accountability environment. It offers the chance to own enterprise security platforms and contribute to shaping the future of AI-ready connectivity.

The TL;DR
• Role: Full Time
• Type: Full-time
• Location: In-person – Bengaluru, Karnataka, India

• Mission: To own, administer, and continuously improve core enterprise security platforms to maintain a resilient enterprise security posture.
• Tech Stack: Tenable, Cortex, Qualys, CrowdStrike Falcon, Microsoft Defender, Cortex XDR, Python, PowerShell, Bash, APIs, SOAR, SIEM/SOC tooling, Palo Alto, Fortinet, Cisco.

What You’ll Actually Do
• Platform Management: Own the administration, health, configuration, lifecycle support, upgrades, and operational readiness for assigned enterprise security platforms.
• Security Controls: Administer and optimize secure email gateways, web filtering, web reputation controls, and network security controls to reduce exposure to threats.
• Endpoint & Data Protection: Maintain Endpoint Detection and Response (EDR)/XDR coverage across Windows and Linux environments, and lead Data Loss Prevention (DLP) policy validation, tuning, and control effectiveness checks.
• Vulnerability Remediation: Perform vulnerability scanning, analyze results using platforms such as Tenable, Cortex, or Qualys, and provide prioritized remediation guidance.
• Automation & Support: Develop and maintain automation using scripting languages like Python, PowerShell, or Bash, and provide senior technical support for incident investigations and escalations.

The Must-Haves
• Background: Senior-level engineer with independent judgment, deeper technical ownership, and strong delivery accountability, requiring 7-14 years of hands-on experience in Security operations, Information security, SOC, or Security engineering.
• Experience: Practical experience in at least three domains among email security, network security, EDR/XDR or endpoint protection, DLP, vulnerability management, web security, SIEM/SOC tooling, or security automation, including hands-on work with enterprise EDR/XDR platforms (e.g., CrowdStrike Falcon, Microsoft Defender, Cortex XDR) and vulnerability platforms (e.g., Tenable.io/sc, Qualys).
• Skills: Strong working knowledge of TCP/IP, routing, switching, firewalls, proxies, IDS/IPS, DNS, VPN, and segmentation; ability to independently troubleshoot complex security platform issues; intermediate scripting or automation capability using Python, PowerShell, Bash, or REST APIs; strong communication skills and a high ownership mindset.
• Bonus: Microsoft SC-200, CompTIA Security+, CEH, CISSP, CySA+, or equivalent security operations certification; vendor certifications from Palo Alto, CrowdStrike, Fortinet, Cisco, Microsoft, Tenable, Qualys, or equivalent enterprise security platforms.