MANTECH seeks a motivated, career and customer-oriented **Senior Cyber Security Engineer** to join our team in **Chantilly, VA** .

In this role, you will support mission-critical cybersecurity operations by designing, deploying, and maintaining secure, resilient data collection and monitoring solutions that enable informed decision-making across the enterprise.

**Responsibilities include but are not limited to:**

+ Troubleshoot new and existing data collection issues to ensure accurate and reliable ingestion of security-relevant data.
+ Diagnose and resolve system issues that impact stability, performance, or usability.
+ Deploy, manage, and maintain supported and unsupported Splunk Add-ons required for specific data sources.
+ Develop and maintain documentation, including Body of Evidence (BOE) artifacts, engineering documentation, change management records, system security plans, and accreditation materials, as required.
+ Deliver a comprehen...