Windows/ Linux System Administrator

Maximus is seeking a Windows / Linux System Administrator to manage and support internal-use telephony systems for our Homeland Security customers. This role provides technical management for the configuration, maintenance, and troubleshooting of enterprise telephony infrastructure, with responsibilities spanning operating systems, networking, security, and application support.

This is an on-site position in Colorado Springs that requires a Secret Clearance.

Maximus TCS (Technology and Consulting Services) Internal Job Profile Code: TCS246, T2, Band 5

Job-Specific Essential Duties and Responsibilities:

• Install, configure, operate, monitor, and maintain enterprise infrastructure, including web servers (e.g., IIS), application servers, and telecom hardware (e.g., Dell PowerEdge servers, Anaya J Series phones).
• Install, configure, troubleshoot, and resolve issues related to, Windows / Linux 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.
• Apply regular and emergency patches to Windows / Linux Server environments to maintain security and compliance.
• Perform system upgrades and migrations, including planning, testing, and execution.
• Conduct regular system health checks and preventive maintenance.
• Coordinate with security teams to address audit findings and implement appropriate remediations.
• Other tasks as assigned.

Job-Specific Minimum Requirements:

• Active Secret Security Clearance.
• Due to contract requirements, only US Citizens can be considered.
• Minimum of 3-5 years of experience with Windows / Linux Server environments, including installation, patching, and troubleshooting.
• Hands-on experience administering, configuring, patching, and troubleshooting Linux systems.
• Networking experience includes IPv4 / IPv6, ports/protocols, and monitoring.
• Familiarity with remediation and validation of security vulnerabilities in a Windows / Linux Server environment.
• Proficiency with managing and monitoring infrastructure, including telephony peripherals and server systems.
• Knowledge of client/server certificate management.
• Experience with Active Directory and Group Policy Administration.
• Ability to move throughout an office environment and occasionally lift and carry up to 50 pounds.
• Candidates must reside within a commutable distance for daily onsite work and on-call requirements.
• 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.

Preferred Skills and Qualifications:

• Prior DHS suitability.
• Scripting experience (PowerShell, Shell scripting).
• Experience with VMware environments, including ESXi and vCenter, for installation, upgrades, troubleshooting, and ESXi certificate management.
• Experience with Microsoft SQL Server and PostgreSQL databases.
• Experience with security vulnerability remediation and validation.

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Minimum Requirements

TCS246, T2, Band 5

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.

Minimum Salary

$70,000

Maximum Salary

$80,000