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T-Rex Solutions

Voice Systems Administrator

Columbia, MD, United States
Fort George G Meade, MD, United States

$80,000 to $100,000 USD / year

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Job details

Pay: $80,000 to $100,000 USD / year
Experience: · Minimum of 3-5 years of relevant IT experience.
Posting language: English
Posted: Nov 5, 2026

Original job description

Are you ready to make a significant impact by supporting critical national security infrastructure? T-Rex Solutions is looking for a fully cleared Voice System Administrator to join our dynamic team in the Columbia, MD area.

Responsibilities:

Join a mission-focused team supporting critical communications infrastructure. We are seeking a detail-oriented Telephony System Administrator who brings strong technical troubleshooting, security monitoring, and collaboration skills to help maintain reliable, compliant, and secure communications systems for customer operations.

Responsibilities Include:

Provide overall system administration for an enterprise-wide Cisco Unified Communications Manager and related systems.
Plan regular maintenance tasks including updates and upgrades.
Maintain current and accurate documentation of system configurations.
Design, administer, and analyze corporate dial plans and traffic routes for voice network structure.
Administer and monitor voice systems for performance and SLA attainment.
Provide support as needed to lower tier break/fix resolution and move/add/change/deactivation requests for all telecommunications systems.

Seven (7) years of experience as an SA in programs and contracts of similar scope, type, and complexity are required. Bachelor’s degree in Math, Science, Engineering, Statistics, Engineering Management or a related discipline from an accredited college or university is required. Five (5) years of additional SA experience may be substituted for a Bachelor’s degree. Experience with the configuration and administration of common TDM and VOIP telephone call manager systems, such as the Nortel Meridian line of PBXs and Cisco Unified Call Manager. Large-scale implementation experience with Cisco Voice in a multi-cluster environment and data networking infrastructure. Working knowledge of H.323 and SIP. Familiar with Cisco UCS platforms, voice gateways, virtualization, and ESXi.. DoD 8570 IAM Level 2 required.

Requirements:

•

Minimum Education and Experience:

· High school diploma or GED required.

· Minimum of 3-5 years of relevant IT experience.

· Must possess 8570 Certification; Security+ certification is highly preferred.

Technical Skills:

· Highly skilled in installing, repairing, and troubleshooting computer hardware and peripherals.

· Well-versed in installing Windows operating systems, software applications, antivirus programs, and security patches.

· Demonstrated ability to read, interpret, and apply information from technical manuals and schematics.

· Proficient in Microsoft Office Applications, including Word, Excel, PowerPoint, and Access.

· Demonstrated expertise with Microsoft Windows 7 and Windows 10 operating systems.

· Familiar with Active Directory security and policies, supporting secure and compliant IT environments.

· Proficient in supporting end-users remotely, providing timely and effective technical assistance.

Professional Competencies:

· Excellent analytical and problem-solving skills with the ability to manage complex technical issues independently.

· Outstanding verbal and written communication skills to effectively collaborate with team members and support end-users.

· Strong organizational skills, with the ability to manage time and priorities efficiently and work with minimal supervision.

Additional Requirements:

· Must be able to drive a company vehicle as part of job responsibilities.

· Ability to lift and move items weighing up to 50 lbs as required.

· Availability to work an 8-hour shift scheduled between the hours of 6:00 AM and 6:00 PM, as determined by management.

Active TS/SCI w/ FSP

T-Rex Overview

Established in 1999, T-Rex Solutions, LLC is a proven mid-tier business providing data-centric mission services to the Federal government as it increasingly tries to secure and leverage the power of data. We design, integrate, secure, and deploy advanced technical solutions for our customers so they can efficiently fulfill their critical objectives. T-Rex offers both IT and professional services to numerous Federal agencies and is a leader in providing high quality and innovative solutions in the areas of Cloud and Infrastructure Services, Cyber Security, and Big Data Engineering.

T-Rex is constantly seeking qualified people to join our growing team. We have built a broad client base through our devotion to delivering quality products and customer service, and to do that we need quality individuals. But more than that, we at T-Rex are committed to creating a culture that supports the development of every employee's personal and professional lives. T-Rex has made a commitment to maintain the status of an industry leader in compensation packages and benefits which includes competitive salaries, performance bonuses, training and educational reimbursement, Transamerica 401(k) and Cigna healthcare benefits.

T-Rex is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, religion, color, sex (including pregnancy and sexual orientation), parental status, national origin, age, disability, family medical history or genetic information, political affiliation, military service, or other non-merit based factors.

In compliance with pay transparency guidelines, the annual base salary range for this position is $80,000-$100,000. Please note that the salary information is a general guideline only. T-Rex considers factors such as (but not limited to) scope and responsibilities of the position, candidate’s work experience, education/training, key skills, internal peer equity, as well as market and business considerations when extending an offer.

T-Rex offers a diverse and collaborative work environment, exciting opportunities for professional growth, and generous benefits, including: PTO available to use immediately upon joining (prorated based on start date), paid parental leave, individual and family health, vision, and dental benefits, annual budget for training, professional development and tuition reimbursement, and a 401(k) plan with company match fully vested after 60 days of employment among other benefits.

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More about this job

Skills

Troubleshooting
Collaboration
System administration
Documentation
Statistics
SIP
Security+
Microsoft Windows
Microsoft Office
Microsoft Word
Microsoft Excel
Microsoft PowerPoint
Microsoft Access
Microsoft Active Directory
Problem solving
Communication skills
Organizational skills
Manage time
Cybersecurity
Data engineering
Customer service
Regulatory compliance

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