Senior Principal Cyber Security Engineer
Company : ManTech International
Location : Chantilly, VA
Posted Date : 4 November 2025
Job Type : Full Time
Category : IT Operations & Helpdesk
Occupation : Cyber Security Engineer
Job Details
ManTech seeks a motivated, career and customer-oriented Senior Principal Cyber Security Engineer to join our team in the Chantilly, VA.
Responsibilities include but are not limited to:
Troubleshoot new and current data collection issues
Troubleshoot system issues that make the system unstable or unusable.
Deploy and manage all supported and unsupported Splunk Add-ons that are required for specific data sources
Provide documentation such as body of evidence documents (as needed), engineering documents, change management documents, system security plans, and accreditation documents
Deliver a comprehensive Splunk deployment document to detail the specifications, deployment methods, and other architectural considerations to the production environment.
Maintain a strict role-based access control solution around the data collected, to provide a need-to-know ability
Forward Configurations and Deployments: Design and deploy forwarders rapidly with centralized configuration management (Splunk Deployment Server).
Minimum Qualifications
Bachelor’s degree or 4+ additional years of cyber experience in lieu of degree
10+ years of experience in a cyber 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 & Accreditation processes
Knowledge of DoD policy and technical security guidance to information systems
DoD Directive 8570.1 IAT Level II or higher certification or ability to obtain within 6 months.
Splunk Certification is required
Preferred Qualifications:
Experience with Linux, Red Hat and CentOS
Experience with AWS or other cloud environments
Knowledge of ICS 500-27 for Audit collection requirements
Knowledge of Enterprise Security Services, Host Base Security Service, Enterprise Vulnerability Scanning Service, and UAM
Ability to modify feed creation to ingest customer logs in a standard format to meet policy requirements.
Security Clearance Requirements:
Must have a current/active TS/SCI w/Polygraph
Physical Requirements:
The person in this position must be able to remain in a stationary position 50% of the time. Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations.
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