**ManTech** is seeking a motivated, career and customer-oriented **Principle Cyber Network Engineer** to join our team in the **Chantilly, VA** . As a Principal Cyber Network Engineer, you will be responsible for expanding network architecture of various vendor network devices, such as routers, switches, load balancers and firewalls. Work closely with cross domain engineers to implement and maintain the robust and highly available network devices surrounding a complex cross domain system. **Responsibilities include, but are not limited to:** + Prioritize requirements based on the needs of the project + Interacts with other team members and customers at multiple levels to gather, supply, or coordinate information + Good communication and customer service skills are needed along with ability to coordinate effectively with individuals from multiple levels + Provides insight into efficiencies that can be gained from the current workflow based on an understanding of the customers’ requirements + Work with engineers on troubleshooting and building complex, highly available network topologies + Performs engineering support and system administration of applications and systems to include installation, configuration, maintenance, patching, and back-up/restore + Provides Tier 2/3 maintenance and engineering support for deployed technologies + Supports Assessment and Authorization activities related to cybersecurity technologies, where applicable + Identifies potential conflicts with implementation of any cybersecurity tools within the enterprise and develops recommendations to remediate these conflicts + Provides ideas for automating repetitive project tasks and metrics collection using scripts and assists with testing/implementation to production **Minimum Qualifications:** + 7+ years of related network experience (firewalls, routers, switches, and load balancers) + Bachelor's degree or 4 additional years of experience in lieu of degree + Knowledge of Windows and Linux systems, general operating system security practices, TCP/IP networking, and network security concepts is required + Experience with deploying, upgrading, and troubleshooting multivendor network equipment and solutions, including Juniper, F5, and Nutanix + Must have or be willing to obtain IAT Level II or higher certification within 6 months of hire **Preferred Qualifications:** + Excellent written/oral communications skills and strong analytical and problem-solving skills + Excellent organization, planning, and multi-tasking skills with attention to detail + Understanding of federal Cyber Security Guidance such as NIST SP 800-37 – Guide for Applying the Risk Management Framework (RMF) to Federal Information Systems and NIST 800-137 – Information Security Continuous Monitoring (ISCM) for Federal Information Systems and Organizations + Ability to function in a fast-paced environment and effectively manage multiple tasks simultaneously; coordinating resources and ensuring scheduled goals are met + In-depth understanding and practical knowledge of LANs, firewalls, routers and switches + Ability to make decisions and resolve problems effectively – seek out information and data to evaluate, prioritize and formulate best solution or practice + Must be able to multi-task, work independently and as part of a team, share workloads, and deal with sudden shifts in project priorities **Security Clearance Requirements:** + Must possess an active TS/SCI w/ Polygraph **Physical Requirements:** + Must be able to remain in a stationary position 75% of the time + Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer + The person in this position frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations + Must be able to detect information on a computer screen 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.