Voice Over Internet Protocol Technician

General information

Requisition # R66417 Locations USA-MD-Annapolis Junction Posting Date 03/03/2026 Security Clearance Required TS/SCI w/ Poly Remote Type Onsite Time Type Full time

Description & Requirements

Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we’ve been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH!

MANTECH seeks a motivated, career and customer-oriented Voice Over Internet Protocol (VOIP) Technician to join our team in Annapolis Junction, MD. The VOIP SME is responsible for supporting Cisco Unified Call Managers for a global footprint in addition to POTS lines, both supporting e911 services in support of the Government customer.
 

Responsibilities include but are not limited to:

• Provides broad telephony support from administrator level configurations to in-depth technical solutions for critical clients over secure and nonsecure networks.
• Works as the SME for engineers, surveyors, installers, and project managers to develop and execute end-to-end solutions for various vendor products.
• May manage multiple communication projects that provide critical response efforts resulting in streamline services for analog, digital, and video requirements.
• Provides administration to voicemail servers, call managers, and emergency responders involving T1, fiber, Ethernet, multiplexing, copper wrap, and cellular servicing.
• Configures and troubleshoots multi-vendor hardware and software systems to enable users to perform complex defense operations.
• Engages support for the escalation and communication of status to agency management and internal customers.
• Support clients across multi-level service platforms, executing in-depth solutions to resolve real-time incidents and requests.
• Provide support to TCP/IP network protocols that rely on TCP, Session Initiation Protocol, session description protocol, and VoIP codecs to provide reliable service. .
• Monitor, tune, and support basic existing telephone systems and network infrastructure to ensure stable, reliable, secure, and efficient communications operations.
• Support Identification, assessment, and development of detailed requirements such as supporting re-architecture of network segments in order to facilitate new requirements, technologies and growth.
• Support lien mitigation efforts related to maintaining a compliant System Security Plan and associated network security and communicate effectively with a wide variety of technical and non-technical audiences, including customers, team partners, and other staff members.
• Travel is required in support of service requirements ~10-20%. This position also offers opportunities to support other bodies of work,