We are seeking a technically experienced and solutions-driven Senior Microsoft Teams Voice Architect to lead the deployment, configuration, and lifecycle management of Microsoft Teams Voice solutions in a secure, enterprise environment spanning over 800 sites. This role involves hands-on technical work, solution development, and ongoing optimization of Microsoft Teams Phone System, Direct Routing, Operator Connect, and Session Border Controllers (SBCs). The ideal candidate is comfortable managing complex telephony environments, supporting integration with enterprise workflows, and ensuring compliance with federal cybersecurity standards. Requirements: - U.S. Citizenship is required - Must possess an active TS clearance at the time of application, be willing and able to obtain SCI access, and pass a CI polygraph. - This position is onsite 5/days a week in Washington D.C. with Travel up to 25% Qualifications and Experience: - Bachelor's Degree in Information Systems, Computer Science, Business Systems, or related IT Management or equivalent combination of education, training, and work experience - Minimum 8 years of experience in enterprise telephony or unified communications, with direct experience supporting Microsoft Teams Phone System. - Proficient in PowerShell scripting, Microsoft Teams Admin Center, and Microsoft 365 Admin Center. - Excellent troubleshooting skills and strong attention to detail. - Strong communication skills with both technical and non-technical stakeholders. - Hands-on expertise with Microsoft Teams Voice technologies: Direct Routing, Operator Connect, Session Border Controllers (SBCs), SIP/VoIP routing and dial plan design. Preferred Qualifications: - Experience migrating from legacy PBX to Microsoft Teams Voice. - Familiarity with government cybersecurity compliance frameworks (e.g., STIGs, FISMA, NIST). - Experience with integrating Teams Voice with third-party systems or services. Microsoft 365 Certified: Collaboration Communications Systems Engineer Associate (or equivalent) Responsibilities: - Enterprise Deployment: Lead implementation and support of Microsoft Teams Voice services across 800+ locations, including dial plan design, SBC configuration, and integration with Operator Connect and Direct Routing. - Voice System Optimization: Configure and maintain advanced Teams Voice features such as e911, call queues, auto-attendants, voicemail, and number management. - Infrastructure Monitoring & Maintenance: Conduct infrastructure health checks and apply software, firmware, and security updates to telephony systems and components. - Testing & Lab Support: Manage development/test lab environments to validate VoIP devices and Analog Telephone Adapters (ATAs). - Workflow & System Integration: Integrate Teams telephony with enterprise systems, service desks, and ITSM workflows to support business continuity. - Security Compliance: Apply and maintain STIGs, manage vulnerability scanning and remediation, and ensure PKI and certificate validity. - Monitoring & Reporting: Use monitoring tools and dashboards to track uptime, performance, and usage trends; generate reports for stakeholders. - Incident Response & Tier 3 Support: Serve as the escalation point for complex telephony issues, working collaboratively across IT, security, and operations teams. - Mentorship & Knowledge Sharing: Support junior engineers and staff through documentation, peer reviews, and technical guidance Compensation and Benefits: At NDi, we value our team and are committed to retaining top talent by offering competitive benefits and compensation packages. Our employee benefits package includes comprehensive health, dental, vision, pet, and legal insurance. Our corporate benefits include 401(k) retirement matching, paid leave, paid holidays, and health and wellness programs. In addition, we provide employer-paid life and disability insurance, professional development, education benefits, and much more to ensure our team has the resources they need to thrive on and off the job.