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# Principal Cyber Security Engineer

- **Company:** Mantech International Corporation
- **Location:** Chantilly, VA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), .NET Framework, Bash Shell, Unix, CompTIA Security+, Cyber Security, System Configuration, Perl (Programming Language), Python (Programming Language), Systems Integration, Scripting, Information Technology, Data Management, Cyber Warfare, Splunk, Programming Languages
- **Published:** August 30, 2026
- **Apply:** https://www.careerboard.com/us/en/find-jobs-in-United-States/-B5877F6145B77E0E88/

## About the Role

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

In this role, you will support a mission-critical initiative and contribute directly to cybersecurity operations through the administration and engineering of a large enterprise Splunk environment. This position is ideal for professionals with strong hands-on experience in system integration, data management, and cyber defense initiatives. You will play a key role in maintaining and tuning Splunk systems, while collaborating with technical teams and cyber analysts across a dynamic enterprise environment., * Bachelor's degree, or 4+ additional years of IT experience in lieu of a degree.

 * 5+ years of experience in an enterprise and/or cybersecurity-focused environment.
 * Experience with Splunk administration and engineering.
 * Experience with Splunk Enterprise Security (ES) operations and configurations.
 * Proficiency with Unix and Windows environments.
 * DoD 8570 IAT Level II certification (eg, Security+, CCNA-Security, GSEC).

Preferred Qualifications:

 * Splunk certifications such as Architect, Consultant I/II, Admin, or Power User.
 * Experience with Scripting or programming languages (eg, Bash, Python, Java, Perl, .NET).
 * Familiarity with developing and deploying operational and security use cases within Splunk.

Clearance Requirements

 * Must have a current/active TS/SCI with Polygraph.

Physical Requirements

 * 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, or virtual communication, which may involve delivering presentations.

## Description

* Managing the day-to-day operation of large enterprise Splunk deployments.
 * Troubleshooting data collection issues and resolving system conditions affecting stability or integrity.
 * Deploying and maintaining both supported and unsupported Splunk add-ons.
 * Executing Splunk Enterprise upgrades and patches.
 * Configuring and deploying Splunk forwarders using centralized management tools.
 * Maintaining and tuning Splunk Enterprise Security (ES) content and performance.
 * Managing knowledge objects, data models, dashboards, alerts, and operational content.


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