Jr. System Administrator

Posted Yesterday
Be an Early Applicant
O'Fallon, IL, USA
In-Office
51K-92K Annually
Junior
Information Technology • Software
The Role
Supports DISA information systems by performing basic system administration, monitoring systems and alarms, maintaining documentation and procedures, updating tickets, communicating policies, and coordinating with customers and administrators. Provides business-hours, on-call, extended-hour, and weekend support as needed. Requires an active Secret clearance and completion of DoD 8750 certification such as Security+ within six months.
Summary Generated by Built In

Leidos is seeking a candidate to fill a Junior System Administration position supporting DISA's GSM-O contract at Scott AFB, IL.  The System Administrator is responsible for protecting DISA’s information and information systems from unauthorized access, use, disclosure, disruption, modification, perusal, inspection, recording and destruction.

PRIMARY RESPONSIBILITIES:

  • The candidate must be able to work independently to maintain the smooth operation of a multi-user computer systems, including coordination with customer and other administrators.

  • Communicate policies and procedures to customers

  • Update digital systems to provide insight to ongoing efforts and tickets

  • Monitor alarm systems

  • Perform basic level system administrator duties.

  • Interacts with users and evaluates vendor products.

  • Creates, maintains, and implements detailed documentation and maintains standard operating procedures.

  • Provides support on a M-F business hours schedule, also responsible for on-call, extended hour, and weekend support as required by mission or emergency situations.

  • System monitoring using installed tools as well as external tools.

 
BASIC QUALIFICATIONS:

  • BA Degree and less than 2 years of experience. Experience may be accepted in lieu of degree.

  • 1 year of experience in customer service environment

  • Must hold an active SECRET security clearance prior to start. 

  • Complete DoD 8750 certification e.g. Security+ within 6 months of start date.

  • Basic Understanding of Scripting Languages

PREFERRED QUALIFICATIONS:

  • Additional training, education, or certification in IT related programs

  • Experience with a ticketing system

  • Experience working with virtual environments.

GSMO

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:September 11, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:Pay Range $50,700.00 - $91,650.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Skills Required

  • Bachelor's degree, or equivalent experience accepted in lieu of the degree
  • Less than 2 years of experience
  • 1 year of experience in a customer service environment
  • Active Secret security clearance prior to start
  • Complete a DoD 8750 certification, such as Security+, within 6 months of start date
  • Basic understanding of scripting languages
  • Additional IT-related training, education, or certification
  • Experience with a ticketing system
  • Experience working with virtual environments

Leidos Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.

  • Healthcare Strength Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
  • Retirement Support Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
  • Wellbeing & Lifestyle Benefits Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.

Leidos Insights

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The Company
HQ: Reston, VA
27,104 Employees
Year Founded: 1969

What We Do

We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.

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