Sr. VoIP Communications Engineer

Vacancy Details

Bowhead seeks a Senior VoIP Communications Engineer to support DHA and federal health-care environments.

Responsibilities

• Design and deploy ZuluCall/Comms UCaaS environments across cloud, IL5-ready datacenters, and on-premises microservice clusters.
• Configure SIP trunks, SBCs, dial plans, IVRs, queues, call recording, voicemail services, and conferencing features.
• Provision and manage SIP endpoints, including Cisco SIP phones, Poly/Polycom, and Yealink.
• Implement call flows, auto-attendants, queueing, callback, and ACD routing logic.
• Configure RedSky/Intrado E911, PIDF-LO, LLDP-MED, and nomadic user location services.
• Validate routing paths and ensure compliance with RAY BAUM’S Act and Kari’s Law.
• Implement secure signaling/media (TLS/SRTP), SIP authentication, and secure provisioning.
• Support SCAP/DISA STIG checks for VoIP-related workloads and UC infrastructure.
• Collaborate with cybersecurity teams on RMF and ATO technical requirements for voice systems.
• Work with site network teams to establish VLANs, DHCP, DNS, QoS, PoE, and firewall rules.
• Assist with WAN redundancy, LTE/Starlink failover, and SD-WAN integrations.
• Diagnose SIP/RTP quality issues: jitter, latency, MOS, packet loss, codec negotiation.
• Troubleshoot SIP signaling, RTP media path, SBC policies, and endpoint registration.
• Provide Tier III support for VoIP, analog gateways, ATAs, SBCs, and softphone applications.
• Collaborate with government technical teams during pilots, testing cycles, and operational validation.

Requirements

• 7+ years designing, deploying, and supporting VoIP/SIP systems.
• Strong command of SIP, RTP, SDP, TLS/SRTP and debugging tools (sngrep, Homer, Wireshark).
• Deep hands-on experience with FreeSWITCH, Kamailio, or OpenSIPS.
• Experience with UCaaS or carrier-grade SIP platforms (NetSapiens preferred).
• Experience with SBCs such as Ribbon, AudioCodes, TelcoBridges, Oracle, or Sangoma.
• Strong understanding of E911, ELIN/ERL, RedSky/Intrado, and location services.
• Proficiency designing dial plans, IVR flows, queue logic, and call routing policies.

Qualifications

• Strong documentation and customer-facing communication skills.
• Experience working with ShoreTel, Cisco CUCM, or similar enterprise telephony platforms.
• Understanding of DISA STIGs, SCAP, RMF, or FedRAMP.
• Familiarity with microservice deployments (Docker/Podman/Kubernetes).

Skills

• Linux experience (Ubuntu, Debian, RHEL).

Benefits

N/A

Pay

N/A

Schedule

N/A

Physical Demands

• Must be able to lift up to 20 pounds.
• Must be able to stand and walk for prolonged amounts of time.
• Must be able to twist, bend and squat periodically.

Security Clearance Requirements

• Must be able to obtain a security clearance at the Public Trust level.
• US Citizenship is a requirement.