Sr. Network Engineer III
Washington dc, DC
Category: Engineer
Industry: Government
Reference ID: JN -032026-105873
Date Posted: 03/09/2026
Shortcut: http://careers.eliassen.com/5X3s7R
Description:
Onsite in Washington, DC
The Sr. Network Engineer III will serve as a subject matter expert for unified communications across voice, video, and collaboration platforms in a fast-paced, mission-critical environment. The role will design, implement, and troubleshoot enterprise UC solutions, including SBCs, gateways, and QoS for real-time traffic. The position will engage with stakeholders to communicate risks and solutions and will contribute immediately to operational support for a security-sensitive customer. The organization values proactive problem solving, teamwork, and continuous improvement.
This is a full-time, permanent opportunity, offering a competitive salary and comprehensive benefits package. Qualified applicants must be willing and able to work on a w2 basis.
Salary: $230,000 - $290,000/ yr. w2
Responsibilities:
- Work as part of a collaborative team delivering technical solutions supporting senior federal stakeholders.
- Design, implement, and troubleshoot enterprise voice, video, and collaboration platforms.
- Configure and support SBCs, voice gateways, dial plans, and QoS for high-quality real-time communications.
- Serve as a technical SME and resolve operational issues with minimal ramp-up.
- Participate in Agile execution and collaborative problem-solving.
- Communicate technical issues, risks, and solutions to technical and non-technical stakeholders.
- Recommend technical improvements and architectural enhancements.
- Contribute to team discussions, planning, and continuous improvement initiatives.
- Support mission operations with urgency, accountability, and ownership.
- Demonstrate immediate contribution in a fast-paced, mission-critical environment.
- Establish and maintain customer trust through expertise and professionalism.
- Apply creativity and innovation to deliver solutions aligned to mission objectives.
Experience Requirements:
- Active Top Secret with SCI eligibility security clearance.
- 10+ years leading or assisting in review, design, and implementation of network engineering solutions with deep hands-on experience in enterprise Unified Communications.
- Demonstrated expertise with Cisco Unified Communications Manager, Webex, and Microsoft Teams.
- Hands-on experience with session border controllers, voice gateways, call routing, and QoS for real-time traffic.
- Experience with VQ Conference Manager, Jabber, Cisco telephony endpoints, and Cisco Expressway.
- Proven ability to troubleshoot and resolve operational voice and video issues in mission-critical environments with minimal ramp-up.
- Ability to contribute immediately in a mission-critical operational environment.
- Essential personnel availability for continuity of operations during shutdowns, emergencies, or other critical situations.
Education Requirements:
- Bachelor’s degree in a technical field preferred.
- DoD 8140-aligned certification for the 441 Network Operations Specialist work role, such as Network+, Security+, Cloud+, SSCP, CASP+, CISSP, or CCNP Security.
- Active Top Secret with SCI eligibility security clearance.
W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked-in state/locality.
Please be advised- If anyone reaches out to you about an open position connected with Eliassen Group, please confirm that they have an Eliassen.com email address and never provide personal or financial information to anyone who is not clearly associated with Eliassen Group. If you have any indication of fraudulent activity, please contact InfoSec@eliassen.com.
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Eliassen Group is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status. Eliassen Group’s Affirmative Action Plan (AAP) is available for inspection by any employee or applicant for employment upon request, during normal business hours of Monday through Friday, 8:30am to 5:30pm EST. Interested persons should contact Phaedra Wells at pwells@eliassen.com for assistance. It is unlawful in Massachusetts and Maryland to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Applicants with disabilities that believe they require an accommodation or assistance with a position, please email our HR team at hradmin@eliassen.com. This email inbox is designed exclusively to assist job seekers whose disability prevents them from being able to apply online. Emails sent for other purposes will not receive a response.
Please be advised that a number of fraudulent job postings have been released under the Eliassen Group brand.
Unfortunately, fraudulent job postings can happen. If anyone reaches out to you about an open position connected with Eliassen Group, never provide personal or financial information to anyone who is not clearly associated with Eliassen Group
If anyone seemingly from Eliassen Group has ever requested this personal information in the past or does so in the future, please contactInfoSec@eliassen.com.
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