Provides third-tier technical support for enterprise cybersecurity customers, diagnosing complex issues through lab reproduction, source-code analysis, networking and systems investigation. The role prioritizes customer impact, develops workarounds with Engineering, supports Sales engagements, documents solutions, improves support processes, creates customer-facing content, and participates in limited on-call coverage. Requires expertise in Linux, networking, security technologies, databases, cloud and virtual environments, plus strong customer communication and escalation management skills.