Senior Network Engineer

Description D3 Air and Space Operations has a contingency opening for a Senior Network Engineer in Tallahassee, FL. The Senior Network Engineer designs, implements, and supports complex enterprise network and voice systems, including wired, wireless, VoIP, and SIP infrastructure. The role contributes to network architecture, forecasts resource requirements, and provides engineering and operational support to Product Managers, vendors, and state agencies for statewide communications services. Network Planning and Architecture:Plan, forecast, and implement complex network systems, including wireless, and identify their resource and capacity requirements.Participate in network architecture design and engineering, integrating topologies, hardware, software, transmission and signaling links, and protocols into complete configurations.Produce and maintain network diagrams, design documentation, and technical standards.Engineering and Operations:Evaluate new products and technologies for technical fit and interoperability.Resolve complex network problems, monitor protocol compatibility, tune systems for performance and reliability, and recommend improvements.Voice, SIP, and SBC Engineering:Design and support hosted VoIP and SIP trunking services, including call routing, dial plans, and redundancy.Configure and maintain Session Border Controllers (SBCs) for SIP normalization, interoperability, topology hiding, and NAT traversal.Manage carrier SIP trunk interconnection, codec negotiation, and capacity planning.Secure voice infrastructure using TLS, SRTP, and controls against toll fraud and denial-of-service attacks.Troubleshoot signaling and call quality issues using packet captures and SIP traces.Implement QoS policies and monitor jitter, latency, and packet loss.Product and Service Support - engineering and operational support to Product Managers, vendors, and state agencies for:Statewide network; Local Area Network (LAN); Virtual Private Network (VPN); Domain Name System (DNS) services.Hosted VoIP and SBC infrastructure; SIP trunking and carrier interconnection.Serves as a team member on one or more projects, occasionally as team lead, and may coach junior technical staff. Position Requirements Bachelor’s degree in Computer Science, Information Systems, or a related field, or equivalent work experience.Three to five years of IT experience in infrastructure or network environments performing network engineering (hardware and/or software), design, planning, and implementation; minimum 3 years required.Knowledge of VoIP, SIP, and SBC technologies.Experience with network monitoring tools.Excellent verbal communication skills; able to interact professionally with executives, managers, vendors, and subject matter experts.Excellent technical writing skills, including complex reports, plans, and briefings; strong organizational skills.Familiarity with State of Florida government business practices; understanding of records confidentiality under Chapter 119, Florida Statutes, and Department policy.Must successfully pass a State of Florida criminal background screening.Full-time, on-site in Tallahassee, FL. About the Organization D3 Air and Space Operations, Inc was founded Sept 11th, 2006 to provide worldwide, full-service expertise to lead, manage, advise and staff complex aviation, space and cyberspace operations. Headquartered in St. Augustine, Florida, D3 has locations throughout the United States servings defense, public, and commercial customers by providing targeted management, cyberspace, and aerospace solutions. Our team has the background, insight, and expertise necessary to execute high-visibility, high-priority, no-fail operations for our clients. EOE Statement We are an equal employment opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex/gender, sexual orientation, gender identity, national origin, disability, or veterans’ status.