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General information

Requisition #
R55619
Locations
USA-VA-Alexandria
Posting Date
10/17/2024
Security Clearance Required
Public Trust/Suitability
Remote Type
Onsite
Time Type
Full time

Description & Requirements

Become an integral part of a diverse team while working at an Industry Leading Organization, where our employees come first.  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 Telecommunications Engineer- VoIP in the Falls Church/Alexandria, VA area. This is an ONSITE position supporting the US government.

Responsibilities include, but are not limited to:

  • Design, configure, and deploy Cisco Collaboration solutions, including Cisco Unified Communications Manager (CUCM), Unity Connection, and Cisco IM & Presence
  • Develop and implement Voice over IP (VoIP) network architectures that meet US government standards
  • Integrate VoIP systems with existing network infrastructure and ensure interoperability with other communication systems
  • Perform regular maintenance, updates, and patches to VoIP systems to ensure optimal performance and security
  • Troubleshoot and resolve VoIP-related issues, including call quality, connectivity, and configuration problems
  • Provide technical support and training to end-users and IT staff on VoIP systems and features
  • Ensure Collaboration systems comply with US government security protocols and communication requirements
  • Implement and maintain security measures, including encryption, access controls, and monitoring, to protect Collaboration communications
  • Conduct regular security assessments and audits to identify and mitigate vulnerabilities
  • Create and maintain detailed documentation of Collaboration system configurations, network diagrams, and standard operating procedures
  • Generate reports on Collaboration system performance, usage, and security incidents
  • Collaborate with other IT teams to ensure seamless integration and operation of VoIP systems

Required Qualifications:

  • 5+ years of experience in directly related field
  • Must have at least 4 years of Digital Audi Recording (DAR) and Video Tele-conferencing (VTC) experience
  • Must have at least 5 years of experience in Cisco VoIP/ CUCM engineering. Experience configuring and maintaining Cisco routers and switches.
  • Experience with designing, implementing, and maintaining Cisco VoIP solutions
  • In-depth knowledge/experience of CUCM, Unity Connection, Cisco IM & Presence, and related technologies
  • Strong understanding of VoIP protocols (SIP, H.323, MGCP) and network protocols (TCP/IP, QoS)
  • Carrier experience with porting, SIP integration, and edge integration (like TDM gateways and SBC’s).
  • Technical supervisory experience regarding telecommunications engineering
  • Experience planning, evaluating, and coordinating the installation of local and/or remote data and voice communications equipment such as terminals, video conferencing units, multi-point conferencing units, and VoIP telephones
  • Experience managing and issuing individual and system PKI certificates
  • Ability to ensure that appropriate network documentation exists, including operational instructions
  • Excellent troubleshooting and problem-solving skills
  • Strong communication and interpersonal skills
  • CCNA certification

Preferred Qualifications:

  • CCS experience
  • Cisco Certified Network Professional (CCNP)
  • Cisco Certified Voice Professional (CCVP)
  • Bachelor’s or Master’s degree in an IT, engineering, or network field
  • 10+ years IT experience

Clearance Requirements:

  • U.S. Citizenship
  • Ability to obtain and maintain a Public Trust clearance prior to setting start date

Physical Requirements:

  • Sedentary work that primarily involves sitting/standing/walking/talking; and must be able to remain in a stationary position 50%
  • Moving about to accomplish tasks or moving from one work site to another
  • The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
  • Requires frequently communicates with co-workers, management, and customers
  • Communicating with others to exchange information
  • Working with computers
  • Must be able to lift and move hardware weighing up to 75 pounds


For all positions requiring access to technology/software source code that is subject to export control laws, employment with the company is contingent on either verifying U.S.-person status or obtaining any necessary license. The applicant will be required to answer certain questions for export control purposes, and that information will be reviewed by compliance personnel to ensure compliance with federal law. ManTech may choose not to apply for a license for such individuals whose access to export-controlled technology or software source code may require authorization and may decline to proceed with an applicant on that basis alone.

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 Wartime 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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