ManTech Network Engineer, Senior in Colorado Springs, Colorado

ManTech International seeks qualified candidates for a Sr. Network Engineer position to support a large-scale, Federal program critical to our nation s safety. Qualified candidates must possess a current and active Secret security clearance to qualify.

The Sr. Network Engineer:

  • Installs new releases and system upgrades, evaluates and installs patches, and resolves network related problems.

  • Performs system backups and recovery.

  • Maintains data files and monitors system configuration to ensure network integrity.

  • Has knowledge of commonly-used concepts, practices, and procedures within a particular field.

  • Is experienced in executing sound judgment to plan and accomplish goals.

  • Performs a variety of tasks and work under general supervision.

  • Typically reports to a project leader or manager

  • Analyzes network access trends and resolve bandwidth management issues for mission critical systems.

  • Implements, troubleshoots, monitors and maintains all aspects LAN/WAN/VPN/ networks for high availability of parallel development, testing and production environments.

  • Reviews SNMP alerts, use protocol-line analyzers (sniffers) and conducts log forensics in order to determine root cause analysis and resolution of complex issues.

  • Collaborates with Software and Database Developers, Windows and Linux Server Administrators and Security personnel to analyze Systems Development Life Cycle (SDLC) requirements, troubleshoots anomalies and determines appropriate firewall configuration implementation.

  • Drafts and submits recommended change request proposals necessary for timely mitigation of POA&Ms and CVE findings.

  • Maintains system compliance with DHS\FISMA IT Security and Information Assurance objectives concerning privacy of passenger screening information.


Minimum Qualifications:

  • B.S. Degree in Computer Science, Math, or Engineering (or equivalent experience) and 6 to 8 years of relevant professional experience.

  • Ability to work on individual tasks, as well as team-oriented tasks Prioritize competing priorities, work under a cross-matrix management structure

  • Required to be on-call and respond in a timely manner

  • Must be able to adapt to quickly evolving technology and priority changes and have a desire to work closely with other members of the IT/development team.

  • Candidate should be a proactive self-starter with exceptional follow up skills.

  • Must possess excellent written & verbal communication skills.

  • A certain degree of creativity and latitude is required.

Preferred Qualifications:

  • Routing experience to include static routes, EIGRP and route redistribution.

  • 2Switching experience to include understanding of virtual port-channels (vPC aka MEC), spanning tree, first hop redundancy protocols, and security best practices.

  • 3Experience with firewall concepts and configurations to include creating/modifying access control lists, network/port address translation, and virtual private networks.

  • 4Experience with load balancing concepts and configurations to include layer4/layer7, SSL offloading, and health monitoring.

  • 5Monitoring of all network components via SolarWinds.

  • Specific hardware –Switching: Cisco 4500-E/4500R+E/3850/3750X/3560X

  • Firewalls: Cisco ASA 5555X/5545X/5525X+FirePOWER

  • Load balancers: F5 LTM, KEMP VLM


Equivalent Experience/Education, Bachelor's Degree

Years of Experience

11-13 years w/High School Diploma, 05-07 years w/Bachelors Degree, 02-04 years w/Masters Degree

Position Type





For more than 40 years, ManTech employees have been solving complex problems for the national security community. We are comprised of approximately 10,000 talented employees around the world. We adhere to the simple, no-nonsense values on which ManTech was founded more than four decades ago, aligning squarely with the mission objectives of our customers. As our customer base continues to expand and diversify, we continue to diversify our workforce and solutions. Half our employees have a military background, and more than 70 percent hold a government security clearance. As a leading provider of innovative technology services and solutions for the nation's defense, security, space, and intelligence communities; we hold nearly 1,000 active contracts with more than 40 different government agencies.

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 because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Waretime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law. If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

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