Antivirus Engineer

A Fortune 50 financial services company is seeking a highly motivated Antivirus Engineer to join their team in the McLean, Virginia area.

Responsibilities:

• Diagnose and resolve complex performance issues related to Microsoft Defender.
• Review and interpret Client Analyzer logs.
• Recommend tuning and optimization strategies to minimize Defender's resource impact
• Configure and deploy security policies using Intune, MECM, and Ansible
• Develop and execute testing methodologies for deployment and policy validation
• Produce documentation and follow established enterprise engineering and change-control processes
• Conduct network diagnostics including firewall rule evaluation and packet/traffic analysis
• Identify and remediate telemetry gaps or inconsistencies across endpoints
• Review, validate, and maintain security exclusions between test and production environments
• Ensure all security configurations adhere to enterprise, regulatory, and audit requirements
• Conduct assessments of current security posture and recommend improvements
• Review penetration test findings and propose remediation strategies

Qualifications:

• 8 years of experience in Endpoint Security Engineering, Antivirus Operations, or Security Tooling Administration
• Expertise in Microsoft Defender troubleshooting, tuning, and performance analysis
• Strong experience with Intune, MECM, and Ansible for configuration and deployment
• Proficiency in KQL, telemetry validation, and log analysis across Security products
• Hands-on experience with Microsoft security tools (MDE, Sentinel, Defender for Cloud)
• Strong understanding of Enterprise Security, Compliance, and Governance standards
• Familiarity with Network Diagnostics, Firewall Evaluations, and Splunk searches

Desired Skills:

• Experience in large enterprise or financial services environments
• Experience participating in incident Response, Threat Hunting, or Red Team Remediation
• Knowledge of secure Configuration Baselines and Endpoint Hardening frameworks