Sr. VoIP Communications Engineer

UICGS / Bowhead Family of Companies; San Diego (CA); On-site; USD 100,000 - 130,000; Full time

Job summary

A technology services company in California is seeking a Senior VoIP Communications Engineer to design, deploy, and secure advanced VoIP solutions. Candidates should have extensive SIP/VoIP experience, especially in military and healthcare environments. Responsibilities include managing SIP trunks, troubleshooting quality issues, and ensuring secure deployments. This full-time role offers a mid-senior level position with opportunities to help with state-of-the-art communications solutions.

Qualifications

• 7+ years designing, deploying, and supporting VoIP/SIP systems.
• Deep hands-on experience with FreeSWITCH, Kamailio, or OpenSIPS.
• Strong command of SIP, RTP, SDP, TLS/SRTP and debugging tools.

Responsibilities

• Design and deploy advanced unified communications solutions.
• Implement secure signaling/media for voice systems.
• Diagnose SIP/RTP quality issues and provide support.

Skills

SIP/VoIP experience

Signaling and troubleshooting

Configuration of SIP trunks and SBCs

Advanced troubleshooting

Strong communication skills

Tools

FreeSWITCH

Wireshark

Docker

Job description

Senior VoIP Communications Engineer role at UICGS / Bowhead Family of Companies

Bowhead seeks a Sr. VoIP Communications Engineer to assist in designing, deploying, and securing advanced unified communications solutions built on a ZuluCall/Comms platform for military medical treatment facilities in the Pacific Region. This role will support DHA and federal healthcare environments operating modern SIP‑based voice, messaging, and video communications. The ideal candidate has deep SIP/VoIP experience across multi‑vendor platforms, strong signaling and troubleshooting expertise, and the ability to support secure deployments in DoD and health‑care networks.

Key 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 E911/Location Services (RedSky/Intrado, 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.


• Coordinate 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.


• Lead advanced troubleshooting of 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.

Required Qualifications

• 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.


• Strong documentation and customer‑facing communication skills.

Preferred Experience

• Experience working with ShoreTel, Cisco CUCM, or similar enterprise telephony platforms.


• Experience in DoD/DHA environments.


• Understanding of DISA STIGs, SCAP, RMF, or FedRAMP.


• Linux experience (Ubuntu, Debian, RHEL).


• Familiarity with microservice deployments (Docker/Podman/Kubernetes).

Soft Skills

• Strong analytical and problem‑solving skills.


• Ability to lead technical discussions with customers and partners.


• Comfortable working independently in high‑responsibility environments.


• Excellent verbal and written communication.

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.

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Engineering and Information Technology

Industries

IT Services and IT Consulting