Senior Systems Architect

Senior Systems Engineer/Architect

Transform the future of federal services with MANTECH! Join a vibrant, energetic team committed to enhancing national security and public services through innovative tech. Since 1968, we've partnered with Federal Civilian sectors to deliver impactful solutions. Engage in exciting projects in Digital Transformation, Cybersecurity, IT, Data Analytics and more. Ignite your career and drive change. Your journey starts nowinnovate and excel with MANTECH!

ManTech seeks a motivated, career and customer-oriented Senior Systems Engineer/Architect to join our team in DC, Maryland, and Virginia (DMV) area.

As Computer Systems Engineer/Architect, you will be responsible for the design, development, and deployment of the network enterprise architecture. The individual designs and implements computer and information networks, such as local area networks (LAN), wide area networks (WAN), intranets, extranets, and other data communications networks. Designs and develops solutions to complex networking problems, system administration issues, or network concerns. Performs systems management and integration functions.

Responsibilities include, but are not limited to:

• Support the enterprise architecture, design, development, and deployment of network services in support of government customer; collaborate and capture customer requirements, presenting customer requirements in technical exchanges with other government agencies
• Research and implement enterprise-wide network solutions, capabilities, and enhancements to support customer business/mission goals and objectives, while complying with the network architecture and design standards
• Produce SELC project artifacts such as requirements, design documents, diagrams, and other required documentation
• Troubleshoot network incidents, providing root cause analysis and documenting information in tickets and knowledge repositories
• Assist with development and execution of test plans and supporting documentation for network configuration upgrades, additions, or revisions
• Evaluate and report on new/emerging network/communication technologies to enhance capacity, performance, and reliability; Evaluate and recommend changes and/or technology upgrades to address performance, standardization, and industry best practices
• Perform site installations, technology refresh, develop implementation plans and schedules

Minimum Qualifications:

• Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or a related field (or equivalent experience).
• 12+ years of related experience.
• 8570 Compliant certifications and CCNA certification.
• Hands-on experience with Cisco routing, switching, and firewall technology.
• Experience with primary network topologies, LANs, WANs and other common network standards.
• Strong understanding of network protocols and technologies, including TCP/IP, DNS, DHCP, and QoS, MPLS.
• Very strong knowledge of routing protocols (e.g., BGP, EIGRP, OSPF) and network protocols (e.g., TCP/IP, GRE, IPSEC, and VRF).

Preferred Qualifications:

• Master's Degree in Computer Science, Cybersecurity, or a closely related field.
• Knowledge of specific application domains, such as incident response, digital forensics, or threat hunting.
• Experience with security tools and technologies commonly used in SOC environments (e.g., SIEMs, IDS/IPS, firewalls).
• Strong communication and collaboration skills, with the ability to effectively convey complex security concepts to both technical and non-technical audiences.
• Proficiency in programming languages such as Python, Java, C++, and scripting languages relevant to security operations (e.g., Bash, PowerShell).

Clearance Requirements:

• Must have a current/active Secret clearance with the ability to obtain and maintain a TS/SCI.
• The ability to obtain and maintain a DHS EOD suitability is required prior to starting this position.

Physical Requirements:

• Must be able to remain in a stationary position 50%
• Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer
• The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.

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 and provide your name and contact information.