**MANTECH** seeks a motivated, career and customer-oriented **Voice over Internet Protocol (VoIP) Engineer to** join our team in **Norfolk, Virginia.** This position is **onsite.** **Responsibilities include, but are not limited to:** + Design, configure, and deploy Cisco Collaboration solutions, including Unified Communications Manager (CUCM), Unity Connection, and Cisco IM & Presence + Develop and implement VoIP network architectures that meet DoD and Navy standards + Integrate VoIP systems with existing network infrastructure and ensure interoperability with other communication systems + Perform regular maintenance, updates, and patches to VoIP systems to ensure optimal performance and security + Troubleshoot and resolve VoIP-related issues, including call quality, connectivity, and configuration problems + Provide technical support and training to end-users and IT staff on VoIP systems and features + Ensure Collaboration systems comply with DoD security protocols and Navy-specific communication requirements + Implement and maintain security measures, including encryption, access controls, and monitoring, to protect Collaboration communications + Conduct regular security assessments and audits to identify and mitigate vulnerabilities + Create and maintain detailed documentation of Collaboration system configurations, network diagrams, and standard operating procedures + Generate reports on Collaboration system performance, usage, and security incidents + Collaborate with other IT teams to ensure seamless integration and operation of VoIP systems **Minimum Qualifications:** + High School Diploma or equivalent + 5+ years of experience in VoIP engineering, with a focus on Cisco voice technologies + Experience with designing, implementing, and maintaining Cisco VoIP solutions + In-depth knowledge/experience of Cisco Unified Communications Manager (CUCM), Unity Connection, Cisco IM & Presence, and related technologies + Strong understanding of VoIP protocols (SIP, H.323, MGCP) and network protocols (TCP/IP, QoS) + Familiarity with DoD security protocols and Navy-specific communication requirements + Excellent troubleshooting and problem-solving skills + Strong communication and interpersonal skills **Preferred Qualifications:** + Experience working in a DoD or Navy environment is highly preferred **Clearance Requirements:** + US Citizenship and an active Secret clearance **Physical Requirements:** + Must be able to remain in a stationary position 50% + Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer. + The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc. + Up to 25% travel or as needed. ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at careers@mantech.com and provide your name and contact information.