ManTech is seeking a motivated, career and customer-oriented Senior Principal Cyber Network Engineer to join our team in the Chantilly, VA . 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 Other project and corporate duties as assigned to support the customer Basic Requirements: Bachelor's Degree with 10 years of experience or 14 years of equivalent experience in lieu of degree Experience with firewalls, routers, switches, and load balancers Experience with deploying, upgrading, and troubleshooting multivendor network equipment and solutions, including Juniper, F5, and Nutanix Knowledge of Windows and Linux systems, general operating system security practices, TCP/IP networking, and network security concepts Must have or be willing to obtain IAT Level II or higher certification within 6 months of hire Preferred Qualifications: Knowledge 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 Clearance Requirements: Must possess an active TS/SCI w/ CI 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