Senior Cyber Security Engineer

DESCRIPTION & REQUIREMENTS

Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we’ve been solving the toughest challenges with groundbreaking tech.

Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH!

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

Responsibilities

• include but are not limited to:
• * Manage the day-to-day operation, upgrades, and architectural deployment of a large Splunk Enterprise environment.
• * Troubleshoot data collection issues and system instabilities to ensure maximum platform availability.
• * Design, deploy, and manage supported and unsupported Splunk Add-ons and Forwarders using centralized configuration tools.
• * Develop system integrations via APIs and maintain strict role-based access controls for collected data.
• * Oversee Knowledge Object Management, Common Information Model (CIM) tuning, and Enterprise Security configurations.
• * Author comprehensive engineering, change management, and security accreditation documentation, including Body of Evidence artifacts.
• * Perform security analysis and utilize network monitoring tools to enforce security policies and standards collaboratively.

Minimum Qualifications

• * Bachelor’s degree, or 4+ additional years of cyber experience in lieu of degree.
• * 5+ years of related systems administration or security experience.
• * 3+ years of dedicated experience with Splunk and Splunk Enterprise Security.
• * Experience working as a system administrator or security professional within an enterprise environment.
• * Hands-on proficiency operating within both Unix and Windows operating systems.
• * Active DoD 8570 IAT Level II certification.

Preferred Qualifications

• * Active Splunk certifications such as Architect, Consultant I/II, Admin, or Power User.
• * 5+ years of experience with scripting languages (Bash), application development (Python, Java, Perl, .NET), and databases.
• * Demonstrated background implementing security and operational-related use cases.
• Clearance

Requirements

• * An active TS/SCI with Polygraph is required.
• Physical

Requirements

• * Must be able to remain in a stationary position 50% of the time.
• * Occasionally moves 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.
• The projected compensation range for this position is $114,600.00-$190,200.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH’s benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.
• MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.
• If you need a reasonable accommodation to apply for a position with MANTECH, please email us at [email protected] and provide your name and contact information.
• GENERAL INFORMATION
• Requisition #
• R70432
• Locations
• USA-VA-Chantilly
• Posting Date
• 09/02/2026
• Security Clearance Required
• TS/SCI w/ Poly
• Remote Type
• Onsite
• Time Type
• Full time