Network Engineer Senior (Unified Communications/Collaboration)

Clearance Level
Network Engineering
Germantown, Maryland

REQ#: RQ103457

Travel Required: Less than 10%
Requisition Type: Regular

DESIRED QUALIFICATIONS: BA/BS (or equivalent experience), 5-8+ years of experience.

U.S. Citizenship is required for all candidates to be considered for this position.

Must be able to obtain or currently possess a U.S. government security clearance. (Up to DOE Q or DOD TS equivalent depending on specific taking/job requirements)


  • The ideal candidate will have recent, relevant and verifiable daily network operations hands-on experience in an enterprise or service provider environment configuring, deploying, managing, upgrading, troubleshooting, and documenting UC systems, including Cisco Communications Manager (Call Manager) and related systems (Unity Connection, IM & Presence, Emergency Responder, Contact Center Express), and Cisco Video systems, including Expressway Core and Edge, and TelePresence Management Suite.
  • Demonstrated ability to use network infrastructure to support the UC environment, including Infoblox DNS/DHCP/IPAM, Cisco Prime and Cisco ISE.
  • Must have 8+ years of experience in this field.
  • Demonstrated ability with and knowledge of WebEx Collaboration tools including Meetings, Events, and Training session types, recording, presenting, polling, etc. to act as Tier 3 support.
  • Demonstrated ability to prepare diagrams and documentation for multiple audiences including federal customer leadership, contractors, and business partners.  Create project plans and presentations for executive level management, and technical working diagrams and checklists for operations staff.  Develop technical and non-technical standard operating procedures.  Submit Change Control Proposals (CCP) for the CAB (Change Approval Board).
  • Develop and update technical documentation (network architecture text and diagrams, security plan controls annex and risk assessment, etc.) in support of certification and accreditation for the network.
  • Must have recent, relevant and verifiable experience with communications protocols including SIP and H.323.
  • Assist and lead problem resolution activities, coordinating with Cisco TAC, vendors, and carriers, tracking and escalating trouble tickets, identify and implement service restoration workarounds, perform root cause analysis, and interface with customers at all levels to report status and lessons learned.
  • Must have excellent problem-solving skills and a solid understanding of how to troubleshoot connectivity, performance and QOS issues that involve routers, firewalls, and network applications.
  • Must have 8+ years of recent, relevant and verifiable experience in a UC network operations role and expert understanding of current and emerging network technologies.
  • Must intimately understand the TCP/IP stack and how it operates on networks with switches, routers and firewalls.
  • Must have an expert understanding of the TCP/IP stack and previous experience supporting heterogeneous LAN and WAN. Understand common user applications and related protocols (e.g. DNS, DHCP, NTP, SSH, SFTP, SMTP, SSL/TLS, HTTP/HTTPS, LDAP,).
  • Experience with 802.1x and Network Access Control (NAC) is a plus.
  • Must have experience with Wireshark, Ethereal, tcpdump or equivalent packet decoding tools to collect and review packet captures.
  • Can demonstrate proficiency with Linux command line utilities and familiarity with Perl or other shell scripting languages to automate configuration changes, parse log data from switches, routers, and firewalls, detect network traffic anomalies, correlate of log events, performance metrics, and generate reports to support specific service level requirements. etc. Install and operate open-source software to perform network monitoring.
  • Past experience as a sysadmin for both Linux and Windows servers is a plus.
  • The candidate must excel in high-paced, demanding environments where each day provides a new set of challenges under short time constraints involving complex network configurations and/or troubleshooting multiple hosts scattered across large campus and nationwide networks.
  • System administrator experience with e.g., VMware, Variphy, Cisco Prime Infrastructure, Infoblox, Forescout products is a plus.

Other Job Functions

  • The successful candidate will demonstrate initiative and be able to operate without supervision when required. Must have strong time management, multi-tasking, organization, and administrative skills and must be highly proficient with Visio, Project, PowerPoint, Word, Excel, and Outlook.
  • As a member of the network operations team, the ideal candidate will be viewed as a mentor for junior technical staff.
  • Develop documentation to improve current network standard operating procedures (SOPs).  Draft configuration Change Control Proposals (CCP) for submission to the Configuration Approval Board (CAB).
  • Create and update topology diagrams and associated documentation for UC systems.
  • Must have experience modifying firewall rule sets, studying network traffic flows to reverse-engineer the required firewall rules to lock down an application, and troubleshooting firewall problems in an enterprise or service provider environment under short time constraints involving complex network application flows between multiple hosts spanning multiple firewalls and different geographic locations.
  • Must be flexible and able to work nights, weekends and holidays as needed to support planned and unplanned network maintenance and troubleshooting events.  The successful candidate is expected to be available for scheduled on-call 24x7.  Upon hire, the engineer will be issued a laptop, Smartphone (iPhone/Android) and VPN access to allow rapid response to network events whenever the network operations center escalates a problem to on-call senior network engineer staff.
  • As part of the selection process, the candidate must demonstrate excellent verbal and written communication skills, with fluency in English equivalent to a native speaker.
  • Past employment supporting the U.S. Federal government and/or military experience is a plus.
  • Must be able to obtain or currently possess a U.S. government security clearance. (DOE Q or DOD TS equivalent)
  • Ability to travel as needed in support of adjacent DOE field sites, Labs.  Limited travel to field sites within CONUS may be required (a few times per year).

Knowledge, Skills and Abilities

Cisco Communications Manager (Call Manager) and related systems (Unity Connection, IM & Presence, Emergency Responder, Contact Center Express), and Cisco Video systems, including Expressway Core and Edge, and TelePresence Management Suite

SSH, SFTP, Perl, Linux, Scripting, Technical Writing, Presentations, TCP/IP, SSL/TLS.

Work Environment and Physical Demands

The successful candidate will work in an IT data center (raised-floor) environment and be able to lift up to 50 pounds.  Dress code is business casual.

Analyzes customer requirements and provides technical solutions to a wide range of difficult problems.

Performs maintenance and upgrade of networks including servers, routers, switches, firewalls, remote access systems, and networks.

Maintains network integrity and connectivity while ensuring compliance with policies and maintains system backup and recovery capability.

Coordinates the acquisition of hardware and software as well as subcontractor services as needed.

Creates plans and configures systems for data communication networks.

Evaluates new communications technologies to enhance capabilities of the network.

Maintains current knowledge of relevant technology as assigned.

Designs and builds the hardware and software components for computer or telecommunications networks.

Provides guidance and leadership to less-experienced network personnel.

This position requires being fully vaccinated against COVID-19 by January 18, 2022 or the start date, if after January 18. Individuals who work in or reside in Texas or Montana or work outside of the United States may be excluded from this requirement.

We are GDIT. The people supporting some of the most complex government, defense, and intelligence projects across the country. We deliver. Bringing the expertise needed to understand and advance critical missions. We transform. Shifting the ways clients invest in, integrate, and innovate technology solutions. We ensure today is safe and tomorrow is smarter. We are there. On the ground, beside our clients, in the lab, and everywhere in between. Offering the technology transformations, strategy, and mission services needed to get the job done.

GDIT is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status, or any other protected class.