Principal Cyber Security Engineer

General information

Requisition # R61419 Locations USA-CO-Denver Posting Date 06/27/2025 Security Clearance Required TS/SCI w/ Poly Remote Type Onsite Time Type Full time

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 and experienced Principal Cyber Security Engineer to join our team in Denver, CO. This role supports mission-critical cybersecurity efforts by engineering and maintaining secure, scalable systems for data collection and analysis. You will work with a collaborative team to resolve complex system issues, document engineering solutions, and ensure compliance with cybersecurity standards.

Responsibilities include but are not limited to:

• Troubleshooting new and current data collection issues
• Diagnosing and resolving system issues that affect system stability or usability
• Deploying and managing supported and unsupported Splunk Add-ons required for specific data sources
• Creating and maintaining documentation including Body of Evidence (BOE) documents, engineering artifacts, change management records, system security plans, and accreditation packages
• Delivering detailed Splunk deployment documentation outlining specifications, deployment methods, and architectural considerations for production environments
• Implementing and maintaining strict role-based access control (RBAC) around collected data to enforce need-to-know access
• Designing and deploying Splunk forwarders using centralized configuration management through the Splunk Deployment Server

Minimum Qualifications:

• Bachelor’s degree or 4+ additional years of cyber experience in lieu of a degree
• 7+ years of experience in a cybersecurity role
• Hands-on experience with Security Information and Event Management (SIEM) platforms, particularly Splunk
• Proficiency with Linux systems administration, operating system security best practices, TCP/IP networking, and network security fundamentals
• Familiarity with Certification & Accreditation (C&A) processes
• Knowledge of Department of Defense (DoD) policy and technical security guidance applicable 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 distributions such as Red Hat and CentOS
• Background working in cloud environments like AWS
• Knowledge of ICS 500-27 audit collection requirements
• Familiarity with Enterprise Security Services, Host-Based Security Services, Enterprise Vulnerability Scanning, and User Activity Monitoring (UAM)
• Ability to configure feed creation processes for customer log ingestion in compliance with policy requirements

Clearance Requirements:

• Must have a current/active TS/SCI with 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.

The projected compensation range for this position is $126,300.00-$210,300.00. 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 it’s 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 International Corporation 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 careers@mantech.com and provide your name and contact information.