Senior Principal Network Security Engineer

ManTech (


  Full Time   Employee   Contractor

United States

Become an integral part of a diverse team that leads the world in the Mission, Cyber, and Intelligence Solutions group. At ManTech International Corporation, you’ll help protect our national security while working on innovative projects that offer opportunities for advancement.

Currently, ManTech is seeking a motivated, career and customer oriented Senior Principal Network Security Engineer to join our team in the Chantilly, VA area to provide unparalleled support to our customer and to begin an exciting and rewarding career within ManTech . The selected individual will lead a team of Network Engineers/Security Engineers maintaining, monitoring and enhancing the infrastructure’s network security posture.

Responsibilities include but are not limited to:

· Ensure IPSs and firewalls are configured in support of network security policies

· Implement and monitor Cisco Access Control Servers to ensure the customer’s least privileged methodology is implemented across all networks and devices

· Monitor security guidelines from Cisco, DISA, and other designated sources

· Submit and execute change requests to ensure all network devices meet security guidelines from Cisco, DISA, and other sources

· Collaborate with our Information Assurance team to ensure all network security controls are properly implemented, monitored, and documented

· Create and maintain Visio network diagrams

· Provide recommendations to improve the network performance while maintaining security compliance

· Provide system wide engineering support for network conflicts, troubleshooting, and resolution

· Perform equipment upgrades and replacements

· Evaluate, design, document, tune, and set standards for network operations

· Provide client consulting and training on the interfacing and use of the network facilities

· Plan and coordinate major computer network initiatives

· Research, evaluate, and recommend new computer network equipment and technologies

· Utilize monitoring, performance analysis, network management, software and hardware equipment to trouble shoot and isolate problems, gauge network performance, and trace data and protocol activity

· Devise solutions to complex operational problems within the capacity and operational limitations of installed equipment

· Develop and executing contingency plans for network software and hardware failures including isolated and major outages

· Provide internal consulting, technical guidance, information and support to application developers, computer operations, workstation support, company management and departmental clients

· Assist in internal training programs

· Provide status reports based on customer and program requirements

· Track and diagnosis network performance issues and develop a network performance profiles

Position requirements:

· Bachelor’s degree (in Computer Science, Engineering, Economics or Math) or equivalent, and ten to twelve years of related experience

· Cisco CCNA Security or equivalent certification required

· Requires a strong background in networking, switching, routing, data center design, and network security

· Requires up to date experience with Cisco ASA firewalls, Intrusion Prevention Systems, Cisco Secure Access Server, and management tools and techniques, including Cisco Prime, Cisco Security Manager and SolarWinds suite of products

· Meet DOD 8570 requirements for IAT II (current Security+ CE), CCNP Security or equivalent CISSP desired

· Experience using Solarwinds Network Performance Monitor or other SNMP-based monitoring system

· Experience using GEMX software and/or working with Type 1 Encryptors

· Experience using packet analysis tools to decode data flows and diagnose protocol level errors

· Experience and knowledge of ITIL-based processes, ITILv3 certification strongly desired

· Experience using Microsoft Project to track project schedules

· Knowledge of NIST 800-53 security controls

Security clearance:
Top Secret with SCI eligibility required

To apply for this job, contact:
Human Resources

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