Ashley Hughes-Jefferson Consulting LLC is recruiting an experienced Senior Systems Engineer / Architect for an onsite opportunity supporting mission-critical emergency communications and federal voice modernization initiatives in Winchester, Virginia. This senior-level position focuses on systems engineering, IP networking, E-911/NG911 integration, SIP/VoIP technologies, emergency services routing, and interoperability within federal and DoD environments. Candidates must possess an active U.S. Secret security clearance. Key Responsibilities Provide systems engineering support for emergency communications integration Conduct architecture reviews, interface analyses, and technical assessments Support E-911 call delivery and associated IP network engineering Analyze IP routing dependencies and interconnection performance Troubleshoot SIP/VoIP call-path and routing issues Support emergency location provisioning and record validation Investigate location discrepancies affecting emergency call routing Coordinate technical and provisioning activities with government and contractor stakeholders Identify technical risks and develop mitigation recommendations Support interoperability between voice systems and Public Safety Answering Point (PSAP) environments Perform technical issue escalation and resolution Use network analysis and troubleshooting tools such as Wireshark Develop technical recommendations and risk assessments Required Qualifications 10+ years of systems engineering or network engineering experience 5+ years of IP routing and enterprise communications experience Experience with SIP/VoIP technologies Experience supporting E-911 or NG911 environments Experience supporting DoD or federal networks Strong IP networking and troubleshooting knowledge Active U.S. Secret security clearance Bachelor's degree in Engineering, Telecommunications, Computer Science, or equivalent professional experience Preferred Experience DISA VISP environments Army voice modernization initiatives PSAP interconnections Public safety communications Federal telecommunications environments Cisco CCNP or CCIE certification Work Schedule & Location This is an onsite position in Winchester, Virginia. The standard work schedule is Monday through Friday, 8:30 a.m. to 5:00 p.m. Eastern Time. Relocation assistance is available. Visa sponsorship is not available. Important Security Requirement Candidates must currently possess an ACTIVE U.S. SECRET SECURITY CLEARANCE. Candidates without the required active clearance should not apply. Candidates whose qualifications appear aligned with the opportunity may be contacted regarding additional recruiting and role-specific pre-screening steps. Participation in the recruiting process does not guarantee employer submission, an interview, an offer, placement, or employment.