Jr. System Administrator

Leidos Inc; O'Fallon (IL); On-site; USD 51,000 - 92,000; Full time

Job summary

Leidos is seeking a Junior System Administrator to support the DISA GSM-O contract at Scott AFB, IL. The role focuses on protecting information systems and maintaining secure, reliable multi-user computer environments.

The candidate will work with customers, document procedures, monitor systems, and provide on-site and on-call support as required by mission needs. A background in customer service and basic scripting is valued, with security clearance eligibility required.

Qualifications

• BA degree or 2 years of experience acceptable in lieu of degree.
• 1 year of experience in customer service environment.
• Must be able to gain an Interim Secret security clearance prior to start.
• Complete DoD 8750 certification e.g. Security+ within 6 months of start date.
• Basic understanding of scripting languages.

Responsibilities

• Maintain smooth operation of multi-user computer systems and coordinate with customer and other admins.
• Communicate policies and procedures to customers.
• Update digital systems to provide insight into ongoing efforts and tickets.
• Monitor alarm systems.
• Perform basic level system administrator duties.
• Interact with users and evaluate vendor products.
• Create, maintain, and implement detailed documentation and SOPs.
• Provide support on a Monday-Friday schedule, on-call, extended hours and weekends as required by mission.
• System monitoring using installed tools and external tools.

Skills

Customer service experience

Interim security clearance eligibility

Security+ / DoD 8750 certification

Scripting languages basics

Education

BA Degree or equivalent

Tools

Ticketing system

Virtual environments

Job description

Description

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 be able to gain an INTERIM 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: August 27, 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 onlyand 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.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [e-mail].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.