Principal Cyber Security Systems Engineer

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 is seeking a motivated, career-driven Principal Cyber Security Systems Engineer to join our team in Chantilly, VA. This role provides an exciting opportunity to secure and optimize complex enterprise infrastructure in support of critical national security missions. The selected candidate will collaborate with multidisciplinary teams to ensure secure, scalable, and high-performing systems across mission environments.
 

Responsibilities

The Principal Cyber Security Engineer will design, implement, and maintain secure, resilient, and scalable enterprise systems that align with mission and business objectives. Responsibilities include but are not limited to:
Design, implement, and maintain complex enterprise systems and infrastructure that support strategic business objectives
Develop and maintain comprehensive system architecture and design documentation
Collaborate with engineering and cybersecurity teams to ensure solutions meet security, performance, and scalability requirements
Configure, administer, and troubleshoot network devices and appliances (Juniper, Cisco, F5, etc.)
Manage and maintain Windows, Linux, and vendor appliance-based systems to ensure availability and reliability
Plan and execute OS upgrades, patches, migrations, and lifecycle management tasks
Develop and maintain disaster recovery and business continuity strategies
Implement and maintain system monitoring, alerting, and proactive incident response mechanisms
Provide mentorship and technical leadership to junior engineers
Stay abreast of emerging technologies and evolving cybersecurity trends
Basic Qualifications

Bachelor’s degree in Computer Science, Engineering, or related field; or 4+ years of additional systems engineering experience in lieu of degree
7+ years of hands-on experience in systems and/or cybersecurity engineering
Current cybersecurity certification (e.g., CISSP, CISM, CEH, Security+CE, CySA+, etc.) or the ability to obtain within six months of hire
In-depth understanding of system architecture, infrastructure design, and engineering principles
Advanced knowledge of networking concepts, protocols, and architectures (TCP/IP, LAN, WAN)
Proficiency with VMware environments (vCenter, ESXi deployment, and administration)
Experience in vulnerability management: scanning, assessment, remediation, and reporting
Expertise with cloud platforms (AWS, Azure, or Google Cloud)
Skilled in both Windows and Linux administration
Preferred Qualifications

Master’s degree in a technical field
Advanced cloud certification (e.g., AWS Certified Solutions Architect, Azure Solutions Architect Expert)
Experience leading security architecture reviews and implementing zero-trust architectures
Exposure to SIEM and enterprise monitoring solutions
Prior experience supporting IC or DoD programs, including ATO/accreditation processes
Security Clearance Requirements

Must possess an active TS/SCI with Polygraph clearance
Physical Requirements

Must be able to remain in a stationary position approximately 50% of the time
Occasionally moves about inside the office to access file cabinets, office equipment, etc.
Frequently communicates with co-workers, management, and customers and must be able to exchange accurate information

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.