"Alerted.org

Senior System Administrator

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI with Polygraph

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Outside Continental US

Anticipated Posting End: 9/19/2025

CACI is seeking **Systems Administrators** with Linux Infrastructure experience to manage and maintain mission-critical operational IT systems and mission applications in Aurora, CO.

We believe in a healthy home/work balance and our locations offer a wide variety of activities to balance with your work life.

More About This Role:

As the Systems Administrator on this contract, you will be on an engineering team that provides IT Systems Administration support to global real-time operational activities. Critical thinking and troubleshooting skills are essential to resolving operational problems and clear communications and briefing skills are essential when communicating with the team, its users, and individuals in leadership roles.

You must be willing/able to work core hours between 6:00 am to 6:00 pm

during the week and participate in on-call rotation for after-hours support

Responsibilities:

+ Provides Tier III support of IT infrastructure systems and custom mission applications based on a Linux environment

+ Create, manage, and maintain accounts and group memberships via Red Hat IPA

+ Experience managing linux-based virtual server environments

+ Hands-on working knowledge of RedHat linux systems

+ Responsible for pro-active systems monitoring and evaluation of environments using Grafana and the documentation, resolution, or escalation of any problems discovered

+ Experience with Linux patching in an operational environment

+ Ensure all Linux systems are running current versions of antivirus software with current virus definition files

+ Ensure all Linux systems are being actively scanned by site provided Tenable software and results are utilized to ensure a secure operational environment

Qualifications:

+ Must have an **active TS with ability to obtain a Polygraph**

+ Hardware experience: servers, workstations, peripherals

+ Experience installing and configuring various COTS products

+ Experience providing physical and virtual support, maintenance, and security for Red Hat systems

+ Experience with Red Hat IPA

+ Experience with virtualization (Red Hat Virtualization, VMWare, ESXi, VCenter etc.)

+ Experience with NAS

+ Requires deep knowledge of job area typically obtained through advanced education combined with experience. Typically viewed as having a specialty within discipline. May have broad knowledge of project management.

+ Typically has a University Degree (BA/BS) or equivalent experience and minimum 7 years of related work

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What You Can Expect:

A culture of integrity.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.

**Your potential is limitless.** So is ours.

Learn more about CACI here. (https://careers.caci.com/global/en/life-at-caci)

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**Pay Range** : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits. Learn more here (https://careers.caci.com/global/en/employee-benefits) .

Since this position can be worked in more than one location, the range shown is the national average for the position.

The proposed salary range for this position is:

$90,300-$189,600

_CACI is_ _an Equal Opportunity Employer._ _All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any_ _other protected characteristic._