Principal Cyber Security Engineer

MANTECH•Chantilly, VA

1d•$141,500 - $236,000•Onsite

About The Position

MANTECH is seeking a motivated, career- and customer-oriented Principal Cyber Security Engineer to join its team in Chantilly, Virginia. The role supports mission-critical cybersecurity operations by designing, deploying, and maintaining secure, resilient data collection and monitoring solutions that enable informed decision-making across the enterprise. The engineer troubleshoots data collection and system issues, manages Splunk add-ons and deployments, creates technical and accreditation documentation, implements role-based access controls, and deploys Splunk forwarders through centralized configuration management. An active TS/SCI clearance with Polygraph is required. This is a full-time, onsite position.

Requirements

Bachelor’s degree, or four or more additional years of cyber experience in lieu of a degree.
At least 7 years of experience in a cybersecurity role.
Experience with Security Information and Event Management (SIEM) platforms and/or Splunk.
Knowledge of Linux systems administration, general operating system security practices, TCP/IP networking, and network security concepts.
Knowledge of Certification and Accreditation (C&A) processes.
Knowledge of DoD policy and technical security guidance for information systems.
DoD Directive 8570.1 IAT Level II or higher certification, or ability to obtain it within six months.
Active TS/SCI with Polygraph clearance.

Nice To Haves

Experience with Linux distributions, including Red Hat and CentOS.
Experience with AWS or other cloud environments.
Knowledge of ICS 500-27 audit collection requirements.
Familiarity with Enterprise Security Services, Host Based Security Services, Enterprise Vulnerability Scanning Services, and User Activity Monitoring (UAM).
Ability to modify feed creation to ingest customer logs in standardized formats to meet policy and compliance requirements.
Splunk certification.

Responsibilities

Troubleshoot new and existing data collection issues to ensure accurate and reliable ingestion of security-relevant data.
Diagnose and resolve system issues that affect 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 artifacts, engineering documentation, change management records, system security plans, and accreditation materials, as required.
Deliver a comprehensive Splunk deployment document detailing specifications, deployment methods, and architectural considerations for production environments.
Implement and maintain strict role-based access control so data is accessible on a validated need-to-know basis.
Design and deploy Splunk forwarders using centralized configuration management through the Splunk Deployment Server.