
Defending the Nation Through Advanced Technology
ManTech stands as a premier technology and consulting company dedicated to advancing national security through innovative solutions. Founded in 1968 with a single Navy contract, this publicly-traded organization has evolved into a multibillion-dollar enterprise serving the U.S. Government across defense, intelligence, law enforcement, science, administration, and healthcare sectors. Headquartered in Herndon, Virginia, ManTech employs over 9,800 talented professionals nationwide, with nearly 40% being military veterans who bring firsthand mission experience to their roles.
Mission Critical Expertise
ManTech specializes in cybersecurity, data collection and analysis, enterprise IT, and systems and software engineering. The company's comprehensive approach addresses the government's most complex challenges through cutting-edge technology and deep domain expertise. With extensive operations across Virginia, Maryland, Washington DC, Colorado, and Texas, ManTech delivers solutions that directly impact national security and public welfare.
Purpose Driven Work Environment
At ManTech, work extends beyond technology-it represents a commitment to public trust and service. Employees contribute directly to protecting communities, supporting service members and veterans, and advancing healthcare initiatives.
Career Growth and Culture
- Nearly half of employees are veterans, creating a mission-driven work environment
- Strong emphasis on public service and national security contributions
- Comprehensive benefits supporting professional development and career advancement
- Collaborative teams with Intelligence Community and federal agency backgrounds
- Opportunities to work on classified projects requiring security clearances
- Technical leadership roles for experienced cyber professionals
- Incident response and security operations expertise valued and developed
Why Professionals Choose ManTech
Federal managers and military leaders trust ManTech because team members understand customer challenges firsthand, having served in similar roles throughout government agencies. This insider perspective enables ManTech to deliver precise, effective solutions while fostering long-term professional relationships built on expertise and reliability. The 4.2 Glassdoor rating reflects a workplace culture that values creativity, energy, and dedication to serving the country.
Mission
ManTech advances customer success by delivering best-in-class solutions, consulting services, and technologies that meet our customers' mission-critical needs anytime and anywhere.
Frequently Asked Questions
Jobs for ManTech in United States
20151 Chantilly, VA
Fort Meade, MD
Fort Meade, MD
78205 San Antonio, TX
90012 Los Angeles, CA
20740 College Park, MD
21076 Hanover, MD
21076 Hanover, MD
21076 Hanover, MD
Fort Meade, MD
Fort Meade, MD
Fort Meade, MD
Fort Meade, MD
Fort Meade, MD

Senior Network Engineer
Description
ManTech seeks a motivated, career and customer-oriented Senior Network Engineer to join our team in Chantilly, VA. This is a position requiring onsite work at customer locations within the local area (up to 10% travel).
Responsibilities Include But Are Not Limited To
- Designing and integrating comprehensive network, VoIP, VTC, and data center solutions, adhering to security guidelines and customer specifications to ensure robust and secure communication infrastructures.
- Managing the end-to-end integration of black and red networks, overseeing design, installation, maintenance, and coordination of a growing network with multiple external services to support operational needs.
- Diagnosing and resolving complex issues related to customer sites, telecommunications circuits, routing, switching, VoIP, VTC, network encryption devices, and Cisco data center/security to maintain network stability and performance.
- Developing and maintaining detailed documentation, diagrams, and standard operating procedures to facilitate knowledge sharing and efficient network management.
- Providing expert guidance, training, and support to network administrators, service desk personnel, and junior engineers to enhance team capabilities and operational effectiveness.
Minimum Qualifications
- Bachelor's degree in Computer Science, Network Engineering, or equivalent field, demonstrating a strong academic foundation in related disciplines.
- 8-10 years of extensive experience in networking, including VoIP, VTC, data circuits, network encryption devices (e.g., General Dynamics TACLANE), and virtualization technologies.
- Proficiency in dynamic routing protocols such as OSPF and BGP, with a deep understanding of MPLS and DMVPN Hub and Spoke technology for efficient network routing.
- DoD 8140 IAT Level II certification: Security+CE and Computing Environment (CE) certification in Cisco technology (CCNA Voice) required.
- Valid US Driver's License with the ability to travel up to 10% locally to customer sites.
Preferred Qualifications
- Cisco Collaboration, Data Center, or Security certifications, indicating advanced expertise and specialized knowledge in relevant Cisco technologies.
- Experience implementing or troubleshooting VMware NSX-T virtualized networking and security platform developed by VMware. It enables automated implementation of network policies, network objects, isolation, and micro-segmentation.
Clearance Requirements
- TS/SCI with the ability to obtain a CI 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

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