Sr. VoIP Communications Engineer

UIC Arctic Response Services, LLC; San Diego (CA); On-site; USD 100,000 - 130,000; Full time

Job summary

UIC Arctic Response Services, LLC is seeking a Sr. VoIP Communications Engineer based in San Diego, California. This role involves designing and deploying VoIP solutions for military medical treatment facilities, requiring extensive VoIP/SIP experience and compliance with security clearance requirements.

The ideal candidate will have at least 7 years of relevant experience and will be responsible for configuring SIP trunks, troubleshooting, and supporting advanced communications solutions. Strong communication skills and independent working capability are essential.

Qualifications

• 7+ years designing, deploying, and supporting VoIP/SIP systems.
• Strong command of SIP, RTP, SDP, TLS/SRTP and debugging tools.
• Experience with UCaaS or carrier-grade SIP platforms.

Responsibilities

• Design and deploy ZuluCall/Comms UCaaS environments.
• Configure SIP trunks, SBCs, and IVR services.
• Implement secure signaling and media.

Skills

VoIP/SIP systems

SIP, RTP, SDP, TLS/SRTP

FreeSWITCH

Kamailio

Tools

Wireshark

sngrep

Job description

Overview

SR. VoIP COMMUNICATIONS ENGINEER (PACMED):

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 health‑care 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.

Responsibilities

VoIP / Unified Communications Engineering

• 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.

E911 / Location Services

• 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.

VoIP Security & Compliance

• 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.

Networking & Infrastructure

• 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.

Troubleshooting & Support

• 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.

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.