**MANTECH** seeks a motivated, career and customer-oriented **Senior Systems Engineer** to join our team in **Quantico, VA** .

**Responsibilities include but are not limited to:**

+ Coordinates the procurement, shipping, installation, configuration, and integration of multi-network systems for a global USMC program, driving a seamless "DISA-to-Desktop" architecture.

+ Plans and designs the connectivity of enterprise system and network assets, ensuring compliance and secure operations across classified networks and domains.

+ Ensures all systems, servers, network switches, and routers are installed, properly configured, and strictly compliant with DISA STIG requirements.

+ Supports the planning and implementation of enterprise service connections across domains, facilitating secure cloud computing architecture (SCCA), cross-domain solutions, and guards.

+ Collaborates with ISSOs and Cybersecurity Services Leads in the Risk Management Framework (RMF) process.

+ Creates diagrams and documentation to facilitate SCI and SAP accreditations.

**Minimum Qualifications:**

+ BA/BS in a relevant technical field AND nine (9) or more years of experience in systems engineering, systems administration or network engineering.

+ OR high school diploma and thirteen (13) or more years of relevant experience.

+ Deep understanding of systems integration, networking protocols (TCP/IP, DNS, DHCP), routing, and comprehensive network security principles.

+ Expertise in configuring and managing enterprise devices (routers, switches, firewalls) with hands-on experience in Cisco technologies (e.g., IOS, NX-OS) and security appliances (e.g., ASA firewalls, ISE).

+ Proven experience securing classified networks (SIPR, NIPR, JWICS) and implementing DISA STIGs; strong familiarity with NIST frameworks and RMF.

+ Must hold an active DoD 8570.01-M IAT Level II certification at minimum.

**Desired Qualifications:**

+ Master’s degree in Computer Science, IT, Systems Engineering, or a relevant discipline.

+ Experience implementing multi-vendor VoIP and VTC products in RMF environments.

+ Experience with scripting/automation tools for system management; familiarity with the ITIL framework (ITIL Foundation certificate desired).

+ Relevant high-level networking or systems certifications (e.g., Cisco CCNP, CCIE, CompTIA Security+, Microsoft, or Red Hat).

+ Prior experience supporting a USMC enterprise program, or experience at a DoD Combatant Command (e.g., INDOPACOM, CENTCOM, CYBERCOM).

**Clearance Requirements:**

+ Must have a current/active TS/SCI clearance

+ Must be eligible to obtain Special Access Program (SAP)

**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.

+ This position requires travel up to 10%

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.