**MANTECH** seeks a motivated, career and customer-oriented **Senior** **Network Engineer** to join our team in **Chantilly, VA.** **Responsibilities include but are not limited to:** + Maintaining the network fabric of the ITD IT system architecture. + Remaining well versed in a multi-vendor environment for layer 2/3 switching and routing, firewalls, SAN directors, as well as virtual and cloud-hosted networking technologies. + Installing, configuring, and maintaining entire physical networking infrastructure including firewalls and core/distribution/access switches and routers. + Utilizing network monitoring applications for traffic, access, and performance of entire network. + Ability to travel domestically. **Minimum Qualifications:** + Bachelor’s degree in Computer Science, Systems Engineering, or other IT-related discipline and 7+ years of relevant experience in information technology, leveraging software applications and tools to meet customer requirements. + In lieu of a Bachelor’s: Associates’ degree and 10 years of relevant experience in information technology, leveraging software applications and tools to meet customer requirements. + Appropriate ND 50-05/DoD 8570.01-M certification. + Experience in performing maintenance and upgrades of networks including servers, routers, switches, firewalls and networks. + Demonstrated ability in configuring routers, switches, and firewalls with appropriate network engineering and communications protocols. + Experience in providing innovating methods and technical solutions to ensure network performance. **Clearance Requirements:** + Must have a current/active TS/SCI w/Polygraph. **Physical Requirements:** + Must be able to remain in a stationary position 50% + Needs to occasionally move about inside the office to access file cabinets, office machinery, etc. + Frequently communicates with co-workers, management, and customers, which may involve delivering presentations. + Must be able to exchange accurate information in these situations. ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at careers@mantech.com and provide your name and contact information.