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Information Security Engineer at MetroSys. Location Information: United States - Remote. . Overview:. MetroSys is seeking a skilled . Information Security Engineer. to support a range of InfoSec initiatives, tool maintenance, and day-to-day security operations for our enterprise client. This role requires a versatile cybersecurity professional with hands-on experience across a variety of security tools and methodologies, with a focus on operational support and project delivery.. Key Responsibilities:. InfoSec Projects & Tool Maintenance:. Manage and maintain . web proxy and VPN solutions. , specifically . Zscaler. .. Support and implement . DMARC configurations. to enhance email security.. Drive . vulnerability management processes. , including scanning, analysis, and remediation coordination.. Utilize . RHEL and Ubuntu. for Linux-based security operations and system hardening.. Leverage . Kusto Query Language (KQL). for analytics and threat hunting in Microsoft environments.. Assist in . penetration test remediation. and address findings related to security program gaps.. Contribute to . Information Security aspects of M&A activities. , including risk assessment and integration planning.. Day-to-Day Security Operations:. Respond to escalations related to . Zscaler tickets. and . MDR alerts. .. Triage and investigate . potential phishing emails. and other end-user reported threats.. Handle . general security requests. , documentation, and collaboration with IT/security teams.. Requirements:. 5+ years in information security roles, ideally with enterprise environments.. Direct experience with Zscaler, Linux administration (Ubuntu/RHEL), and email security protocols (DMARC).. Familiarity with penetration testing processes, remediation tracking, and vulnerability management.. Proficiency in KQL and Microsoft security tooling is a strong plus.. Excellent problem-solving and communication skills.. .