Warrenton, Virginia

Secure our Nation, Ignite your Future

Become an integral part of a diverse team while working at an Industry Leading Organization, where our employees come first.  At ManTech International Corporation, you’ll help protect our national security while working on innovative projects that offer opportunities for advancement.


Currently, ManTech is seeking a motivated, career and customer-oriented Unified Communications Engineer to join our team in Warrenton, VA

Responsibilities include, but are not limited to:

  • Provide expert level support for the Implementation, Deployment and Engineering of UC services

  • Work on issues related to performance management, implementation engineering, fault isolation, troubleshooting UC systems that traverse the WAN and Managed Services

  • Troubleshoot the following UC solutions as they collaborate and interoperate across a WAN and Cloud environment – Avaya Aura and One-X platforms, Polycom VTC systems, Cisco VTC systems, WebEx Meetings and Teams services, Cisco Routing and Switching, Cisco Firewalls, Cisco UC systems (Call Manager, Meeting Server, TMS and Expressways)

  • Create firewall/ACL rule requests for system changes, implementations and deployments

  • Provide WAN subject matter expertise and be the interface with all other engineering teams to facilitate implementation, operations, maintenance and enhancement of Unified Communications services

  • Develop and maintain comprehensive technical artifacts pertaining to the implementation, engineering, and optimization of Enterprise UC services

  • Author SOPs related to standard IT workflows.

Basic Qualifications:

  • 5-7 years of directly related experience

  • Bachelor's degree in a related field or 4 additional years of experience required

  • Must meet DoD IAT Level II qualifications upon hire

  • Must have CCNA Collaboration certification or be able to obtain CCNA 200-301 within 6 months of hire

  • Experience with Microsoft Office applications such as Excel, Word, and Outlook

  • Experience using Microsoft SharePoint

  • Excellent written and communication skills

  • Proficient in Cisco Unified Communications Manager (CUCM) VoIP networks. 

  • Familiar with DoD/IC Voice/Video technologies and integration methods

  • Familiar with the Defense Red Switch Network

  • Skills in the documentation of UC systems and their required services in both word, pdf, and drawing formats (Visio) are required

  • Experience managing a unified communications environment for a large enterprise.

Preferred Qualifications:

  • Proven experience in recommending solutions that improve customer satisfaction and/or the mission of the customer.

Security Clearance Requirements:

  • Must have an active TS/SCI clearance

Physical Requirements:

  • Must be able to remain in a stationary position up to 50%.

  • The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.

  • Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.

For all positions requiring access to technology/software source code that is subject to export control laws, employment with the company is contingent on either verifying U.S.-person status or obtaining any necessary license. The applicant will be required to answer certain questions for export control purposes, and that information will be reviewed by compliance personnel to ensure compliance with federal law. ManTech may choose not to apply for a license for such individuals whose access to export-controlled technology or software source code may require authorization and may decline to proceed with an applicant on that basis alone.

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 because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Wartime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law.

If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

If you are a qualified individual with a disability or a disabled veteran, you have the right to request an accommodation if you are unable or limited in your ability to use or access http://www.mantech.com/careers/Pages/careers.aspx as a result of your disability. To request an accommodation please click careers@mantech.com and provide your name and contact information.

Warrenton, Virginia

ManTech was founded in 1968 to provide advanced technological services to the United States government. We began with a single contract with the U.S. Navy to develop war-gaming models for the submarine community. Over the years, our government's technology needs have increased dramatically in scope and sophistication, and we have grown to meet that challenge.


For more than 4 decades, we kept a careful eye on where emerging technologies were taking the government, and we developed the resources to master those technologies—by staying close to our customers and anticipating their needs, hiring talented professionals to propel us into the future, and acquiring companies with proven capabilities.


Today, we are a multi-billion-dollar public company that provides the innovation, adaptability, and critical thinking our government needs for success in defense, intelligence, law enforcement, science, administration, health, and other fields—throughout the nation and in many countries throughout the world. We are now applying the lessons learned in the unforgiving arena of national security to help the private sector protect networks and critical information.

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