Job Description

General information

Job Posting Title

System Administrator

Date

Wednesday, July 16, 2025

City

Annapolis Junction

State

MD

Country

United States

Working time

Full-time

Description & Requirements

Maximus is seeking a Telephony Analyst to manage and support internal-use telephony systems for our Homeland Security customer. This role will provide technical leadership for the design, configuration, maintenance, and troubleshooting of enterprise VoIP and telephony infrastructure, with responsibilities that span operating systems, networking, security, and application support.

This position is on-site five days a week and requires an active secret security clearance.

Maximus TCS (Technology and Consulting Services) Internal Job Profile Code: TCS249, T4, Band 7

Job-Specific Essential Duties and Responsibilities:

• Manage and support enterprise VoIP and telephony systems across these programs, including hardware, software, peripherals, and call applications such as WFO/WFM, CMS, and call recording platforms.
• Operate, monitor, and maintain enterprise infrastructure, including web servers (e.g., IIS, Apache Tomcat), application servers, and telecom hardware (e.g., Dell PowerEdge servers, Avaya J Series phones).
• Install, configure, troubleshoot, and resolve issues related to VoIP systems, Unix/Linux/Windows servers, network connectivity, and system integrations with Active Directory, DNS, DHCP, and LDAP.
• Collaborate with cross-functional teams to implement telephony solutions that ensure high availability, call quality, and compliance with security and performance standards.
• Other tasks as assigned.

Job-Specific Minimum Requirements :  

• Active Secret security clearance required.
• Due to agency and contract requirements, candidates must be U.S. citizens with no dual citizenship.
• This contract supports systems that require 24x7x365 uptime. Candidates must be willing and able to meet recall requirements, including participation in a rotational on-call schedule.
• This individual must be able to accommodate a rotational on-call schedule as needed.
• This individual must be able to report onsite to Annapolis Junction, MD.
• 7+ years of experience supporting VoIP or telephony systems in a systems administrator or engineer role.

• Experience with VoIP protocols and technologies, including SIP, RTP, SRTP, and Avaya platforms (e.g., Communication Manager, CMS, ACR, WFO, IX Messaging, System Manager).
• Experience in Unix/Linux environments including patching, volume management, LDAP integration, and log analysis.
• Experience with Windows Server environments, including Active Directory, Group Policy, DNS, DFS, and DHCP.
• Networking experience includes IPv4, ports/protocols, IP routing fundamentals, and monitoring.
• Familiarity with remediation and validation of security vulnerabilities.
• Proficiency with managing and monitoring infrastructure, including telephony peripherals and server systems.
• Knowledge of client/server certificates and authentication mechanisms.

Preferred/Desirable Skills:

• Scripting experience (PowerShell, Shell)
• VMWare technologies (vCenter, ESXi)
• Experience with Microsoft SQL Server and PostgreSQL databases
• Exposure to call center solutions such as workforce/schedule management tools and contact recording systems

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Minimum Requirements

TCS249, T4, Band 7

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EEO Statement

Maximus is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, age, national origin, disability, veteran status, genetic information and other legally protected characteristics.

Pay Transparency

Maximus compensation is based on various factors including but not limited to job location, a candidate's education, training, experience, expected quality and quantity of work, required travel (if any), external market and internal value analysis including seniority and merit systems, as well as internal pay alignment. Annual salary is just one component of Maximus's total compensation package. Other rewards may include short- and long-term incentives as well as program-specific awards. Additionally, Maximus provides a variety of benefits to employees, including health insurance coverage, life and disability insurance, a retirement savings plan, paid holidays and paid time off. Compensation ranges may differ based on contract value but will be commensurate with job duties and relevant work experience. An applicant's salary history will not be used in determining compensation. Maximus will comply with regulatory minimum wage rates and exempt salary thresholds in all instances.

Minimum Salary

$

80,000.00

Maximum Salary

$

120,000.00

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