Tier 3 Windows Engineer II - TS/SCI with Polygraph

Clearance Level
Top Secret SCI + Polygraph
Systems Engineering
Chantilly, Virginia
Hybrid Workplace
Key Skills For Success

Avaya Call Management System

Cisco Unified Communications Manager IM

Cisco Voice over IP

Unified Communications and Collaboration (UC&C)

REQ#: RQ166431
Requisition Type: Regular
Your Impact

Own your opportunity to serve as a critical component of our nation’s safety and security. Make an impact by using your expertise to protect our country from threats.

Job Description

Candidates with proven depth creating solutions with Cisco Unified Communications Manager, VoIP, and PBX will be positioned for success in our organization. The selected candidate will design, build and deploy, and administer large scale voice networks. The engineer will provide support to multiple globally dispersed WAN connected sites. Engineers will be responsible for supporting their solutions throughout the IT project lifecycle, to include refining requirements, creating design documentation, creating installation instructions and deployment plans, and providing O&M support. Project assignments will vary based on skill level, and may include engineering geographically dispersed services, integrating services into public, private and hybrid cloud environments, and hardening the solutions to address security and SCAP compliance.


  • Designs and defines system architecture for Cisco based voice infrastructure and end-points
  • Identifies and resolves technical problems related to the installation, upgrade and daily operations of the customer’s globally dispersed VoIP infrastructure
  • Maintain the existing Cisco VoIP environment consisting of Cisco Unified Communications Manager and various models of Cisco and Polycom phones
  • Architecting solutions within the Cisco family of products that may include: CUCM, IM and Presence, Unity, Meeting Servers, Expressway, Meeting Management, Jabber client
  • Design and migration of existing TDM solutions leveraging Session Border Controller technology
  • Develop and document voice SOPs for engineers and Knowledge Base articles for end-users
  • Work with voice providers from other Government agencies and commercial partners to ensure seamless call performance
  • Reviews completion and implementation of system additions and/or enhancements and makes recommendations to management and/or clients

Required Skills:

  • Experience with Cisco Unified Call Manager / Cisco Meeting Server
  • Experience with Cisco Meeting Manager
  • Experience with Cisco Jabber
  • Experience with Cisco Telepresence Management Suite and Cisco Expressways is desired
  • Experience with the configuration of voice end-point hardware
  • Experience with PBX technologies is desired
  • Experience with Avaya Call Management System would be beneficial, but not required
  • Experience with TDM and SBC
  • Experience building/managing servers in the AWS (Amazon Web Services) environment is desired
  • Experience with managing work tasks via tools such as JIRA and ServiceNow
  • System configuration based on security guidelines such as DISA STIGs
  • CompTIA Security+ or similar for IAT Level II DoD 8570 certification
  • Education: Bachelor's degree in Information Technology or related field
  • Required Experience: 10+ years of related experience
  • US Citizenship Required


  • 401K with company match
  • Comprehensive health and wellness packages
  • Internal mobility team dedicated to helping you own your career
  • Professional growth opportunities including paid education and certifications
  • Cutting-edge technology you can learn from

Work Requirements
Years of Experience

10 + years of related experience

* may vary based on technical training, certification(s), or degree


Travel Required



U.S. Citizenship Required

About Our Work

We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 30,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 30 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology.

GDIT is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status, or any other protected class.