Systems Engineer (Cisco-Voice) with Security Clearance

Systems Engineer (Cisco-Voice) Dulles, VA CB-SECV-DUL-002 We are seeking an experienced Cisco Voice Engineer 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 eleven (11) years of relevant Voice/UC engineering experience - Strong technical expertise 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 - Experience supporting secure, enterprise-scale voice environments - Ability to troubleshoot complex call routing, signaling, and interoperability issues - Strong communication skills for documentation, requirements analysis, and customer interaction Preferred Education, Experience, & Skills:
• Advanced expertise in SIP signaling, call flows, and multi-vendor integration - 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)