Systems Engineer; Cisco-Voice Security Clearance

Position: Systems Engineer (Cisco-Voice) with Security Clearance
Location: Dulles

Systems Engineer (Cisco-Voice) Dulles, VA CB-SECV-DUL-001 We are seeking experienced Cisco Voice Engineers to support a mission-critical, technology-driven program for a key Government customer. This role focuses on designing, deploying, securing, and sustaining enterprise-level Cisco Unified Communications solutions across a complex, highly secure environment.

Key Responsibilities:

- Design, test, and deploy new Cisco Voice infrastructure (CUCM, Unity Connection, IM&P, UCCX).

- Implement next-generation voice system technologies and support first article engineering.

- Participate in security accreditation activities for all voice systems.

- Manage PKI/certificate requirements across Cisco UC components.

- Perform system upgrades, patching, and lifecycle maintenance for hardware and software.

- Provide engineering support for new site standups, including dial plan design and endpoint provisioning.

- Design, test, and deploy call center technologies (UCCX/UCCE), including user training and transition planning.

- Execute tasks related to call routing, SIP trunking, SRST, CUBE, and gateway configuration.

- Collaborate with customers and internal teams to gather and refine system requirements.

- Ensure compliance with enterprise standards, policies, and security procedures.

- Work within a large-scale enterprise IT environment with responsibilities specific to Cisco Voice and Unified Communications.

- Partner with network engineering and telecom teams on integration activities involving telephony, call center systems, and network infrastructure.

- Support secure communications devices and infrastructure, including VoIP phones, STEs, Viper phones, encryption devices, POTS/ISDN/leased lines, conference bridges, and call management servers. Required Education, Experience, &

Skills:

- Bachelor's or Master's degree in Computer Science, IT, Engineering, or related field
- Minimum of six (6) years of progressive experience in Voice/UC engineering
- Expert-level proficiency in: SIP signaling and call flows;
Secure Real-Time Transport Protocol (SRTP); SIP, MGCP, H.323; TCP/IP networking; MPLS transport environments; DNS and DHCP; RTP media handling
- Demonstrated experience leading enterprise-scale voice deployments and modernization efforts
- Proven ability to troubleshoot complex, multi-layered call routing and signaling issues
- Strong communication skills for stakeholder engagement, documentation, and technical leadership Preferred Education, Experience, &

Skills:

- Expertise in SIP signaling, call flows, and multi-vendor integration
- Hands-on experience with H.323 in mixed-protocol environments
- Cisco Certified Collaboration Professional (CCCP) or equivalent Cisco Collaboration certifications - CCNP Collaboration - CCIE Collaboration (highly desirable) - Avaya Communications Certification or experience supporting Avaya platforms in hybrid Cisco/Avaya environments

- Experience with secure communications devices (VoIP endpoints, STEs, Viper phones, encryption devices) - Familiarity with government security accreditation processes and PKI/certificate management
- Experience designing or supporting call center technologies (Cisco UCCX/UCCE or Avaya equivalent) - Prior experience in a DoD, IC, or other high-security environment