Demo

Antivirus Engineer

Tandym Tech
Vienna, VA Full Time
POSTED ON 12/18/2025
AVAILABLE BEFORE 2/17/2026

Job Details




Antivirus Engineer


A Fortune 50 financial services company is seeking a highly motivated Antivirus Engineer for our client in the McLean, Virginia area.


Overview:



  • We are seeking an experienced Antivirus Engineer to support enterprise endpoint security operations, with a focus on Microsoft Defender, policy configuration, troubleshooting, and telemetry validation across large-scale environments.

  • This role partners with engineering, cybersecurity, and operations teams to ensure optimal endpoint performance, strong security posture, and adherence to governance standards.


Responsibilities:



  • Defender Performance Troubleshooting

  • Diagnose and resolve complex performance issues related to Microsoft Defender.

  • Review and interpret Client Analyzer logs.

  • Perform root cause analysis using tools such as ProcMon, MpPerformanceRecording, and similar utilities.

  • Recommend tuning and optimization strategies to minimize Defender's resource impact.



  • Policy Configuration & Deployment

  • 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



  • Network & Telemetry Troubleshooting

  • Conduct network diagnostics including firewall rule evaluation and packet/traffic analysis.

  • Use Splunk queries to validate network traffic, telemetry flow, and endpoint behavior.

  • Identify and remediate telemetry gaps or inconsistencies across endpoints.




  • Compliance & Governance


    Review, validate, and maintain security exclusions between test and production environments.

  • Ensure all security configurations adhere to enterprise, regulatory, and audit requirements.




  • Microsoft Security Stack Expertise




  • Hands-on experience with:


    Microsoft Defender for Endpoint (MDE).

  • Microsoft Sentinel.

  • Azure Security Center / Defender for Cloud.

  • Ability to write and interpret KQL advanced hunting queries.




  • Security Posture & Risk Assessment





  • Conduct assessments of current security posture and recommend improvements.

  • Review penetration test findings and propose remediation strategies.




  • Soft Skills



  • Strong analytical, troubleshooting, and problem-solving abilities.

  • Effective communication skills with the ability to collaborate across technical and non-technical teams.


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:



  • 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.


Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.

Salary : $60 - $66

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