Voice Over Internet Protocol Technician - ManTech : Job Details

ManTech seeks a motivated, career- and customer-oriented Voice Over Internet Protocol (VOIP) Technician to join our team in Annapolis Junction, MD.In this role, you will serve as the VOIP SME, supporting Cisco Unified Call Managers across a global footprint and managing POTS lines, including e911 services in support of the Government customer.

Responsibilities include, but are not limited to:

• Provide broad telephony support, including administrator-level configurations and in-depth technical solutions over secure and nonsecure networks

• Serve as the SME for engineers, surveyors, installers, and project managers to develop and implement end-to-end solutions across various vendor products

• Manage multiple communication projects to support critical response efforts and streamline services for analog, digital, and video requirements

• Administer voicemail servers, call managers, and emergency responders involving T1, fiber, Ethernet, multiplexing, copper wrap, and cellular servicing

• Configure and troubleshoot multi-vendor hardware and software systems to support complex defense operations

• Engage in the escalation process and provide timely status updates to agency management and internal stakeholders

• Support clients across multi-level service platforms by executing in-depth resolutions for real-time incidents and service requests

• Provide support for TCP/IP network protocols, including TCP, Session Initiation Protocol (SIP), Session Description Protocol (SDP), and VoIP codecs

• Integrate VOIP systems through planning, design, installation, maintenance, and lifecycle coordination

• Monitor, tune, and support telephone systems and network infrastructure to ensure stability, reliability, and efficiency

• Identify and assess technical requirements, including re-architecting network segments to support growth and new technologies

• Support lien mitigation efforts to maintain a compliant System Security Plan and network security posture

• Communicate effectively with diverse technical and non-technical audiences, including customers, partners, and staff

• Travel approximately 10–20% in support of service requirements; opportunities may include CONUS and OCONUS travel for AVMM support (non-hostile areas only)

Minimum Qualifications:

• Bachelor's degree and 6 years of relevant experience, or 10 years total experience in lieu of a degree

• Experience in IT service management, including incident, problem, change, service level, and knowledge management

• IATT Level 2 certification (e.g., Security+ CE) required; candidates with Level 1 (Net+, A+) may start with expectation to attain Level 2 within 4 months

• Technical management experience, including planning and implementing IT equipment replacement

• Strong presentation skills with the ability to convey technical and business concepts to diverse audiences

• Experience resolving complex customer issues and interacting across personnel levels

• Demonstrated success managing technical projects and satisfying customer needs

Preferred Qualifications:

• Experience with customer ticketing systems such as ServiceNow

• Experience supporting network devices (including servers) for AVMM/IPTV/Streaming services

• IATT Level 2 certification, such as Security+ CE

• PMP and ITIL Foundations V3 certifications

• Experience supporting large-scale enterprise IT contracts

Clearance Requirements:

• Must have a current/active TS/SCI with Polygraph

Physical Requirements:

• Must be able to handle IT equipment of a reasonable nature without assistance

• Move about inside the office to collaborate with team members and use standard office equipment

• Frequently communicates virtually and in person, including delivering presentations. Must be able to exchange accurate information in these situations.