Windows/ Linux System Administrator

Maximus; Colorado Springs (CO); On-site; USD 70,000 - 80,000; Full time

Job summary

Maximus is seeking a Windows/Linux System Administrator to manage enterprise telephony infrastructure for Homeland Security customers. The role covers OS, networking, security, and application support on-site in Colorado Springs with a Secret Clearance requirement.

Responsibilities include server installation, patching, health checks, and collaboration with security teams to maintain compliance and high availability. Requires 3–5 years of relevant experience and US citizenship.

Qualifications

• Active Secret Security Clearance required.
• US citizenship required due to contract.
• 3–5 years of Windows / Linux server experience.
• Experience with Windows/Linux patching and troubleshooting.
• Networking experience including IPv4/IPv6 and DNS/DHCP.
• Experience with AD, GPO, and server health monitoring.

Responsibilities

• Install, configure, operate, monitor, and maintain enterprise infrastructure.
• Manage telecom hardware and web/app servers for telephony systems.
• Patch, upgrade, and troubleshoot Windows/Linux servers and services.
• Coordinate with security teams to address findings and remediations.
• Ensure high availability, call quality, and security compliance.
• Perform system health checks and preventive maintenance.
• Participate in on-call rotations and recall readiness.
• Collaborate with cross-functional teams on solutions.

Skills

Active Secret Clearance

US Citizenship

Windows & Linux Admin

Networking (IPv4/IPv6)

Security patching

On-call rotations

Tools

IIS

VMware ESXi

vCenter

PowerShell

Shell scripting

Active Directory

Group Policy

SQL Server

PostgreSQL

Job description

Description & Requirements

General Information

Date

Wednesday, October 14, 2026

City

Colorado Springs

State

CO

Country

United States

Working Time

Full-time

Description & Requirements

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.

Location and Clearance

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.

#techjobs #clearance #veteranspage #APPCASTDTO

Minimum Requirements

TCS246, T2, Band 5

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.

Accommodations

Maximus provides reasonable accommodations to individuals requiring assistance during any phase of the employment process due to a disability, medical condition, or physical or mental impairment. If you require assistance at any stage of the employment process—including accessing job postings, completing assessments, or participating in interviews,—please contact People Operations at [e-mail].

Minimum Salary

$ 70,000.00

Maximum Salary

$ 80,000.00