Job Description

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.

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