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41 junior systems administrator jobs at 34 companies in O'Fallon, MO

6d
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Systems Administrator
St. Louis, Missouri, United States
HybridFull Time
Altor Solutions
Altor Solutions: Designs and manufactures custom protective packaging and insulation solutions
2+ YOE2+ years of progressive IT experience preferred, with Microsoft 365, Windows, IT policy management, endpoint administration, troubleshooting, user lifecycle management, and security compliance knowledge.
Microsoft 365, Exchange Online, Microsoft Teams, Microsoft SharePoint, Microsoft OneDrive, Microsoft Entra ID, Microsoft Intune, Remote Monitoring and Management (RMM), Windows
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2w
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Jr. Systems Administrator
Scott Air Force Base, Illinois, United States
$60k-$71k/yr OnsiteFull Time
Foxhole Technology
Foxhole Technology: Employee-owned cybersecurity and technology services firm serving federal agencies and commercial clients.
1+ YOERequires 1+ year of systems administration or IT support experience, active Secret clearance with TS eligibility, DoD 8140/8570 IAT Level II certification, and Windows Server or Linux familiarity.
Active Directory, DNS, Group Policy, Windows Server, Linux, HBSS, ACAS, SIEM, Microsoft Excel
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2w
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Systems Administrator
St. Louis, Missouri, United States
$60k-$72k/yr OnsiteFull Time
PENN Entertainment
PENN EntertainmentNASDAQ: PENN: Operates casinos, racetracks, and online sports betting platforms.
2+ YOEBachelor's degree in computer science or related field, or 2–6 years of related experience. Requires operating systems, project management, Windows Server, Active Directory, Cisco UCS, and VMware experience.
Microsoft Active Directory, Cisco Unified Computing System (UCS), VMware Hypervisor, Windows Server, DNS, DHCP, SAN
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1w
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IT Systems Administrator II
Creve Coeur, Missouri, United States
OnsiteFull Time
DAS Acquisition Company
DAS Acquisition Company: Provides residential mortgage lending and home refinancing services.
2+ YOETwo years of systems administration experience required, with Microsoft 365, Active Directory, Entra ID, virtualization, cloud-integrated systems, PowerShell automation, and infrastructure project experience. Associate's degree preferred.
Microsoft 365, Azure, Exchange Online, Microsoft Teams, Microsoft SharePoint, Microsoft OneDrive, Active Directory, Entra ID (Azure AD), Microsoft Copilot, PowerShell, Windows, Linux, Unix, Nutanix, HSA, FSA, CHUBB, 401K, Employee Stock Ownership Plan (ESOP)
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2mo
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Salesforce & Marketing Cloud Systems Administrator
Fenton, Missouri, United States
HybridFull Time
Joyce Meyer Ministries
Joyce Meyer Ministries: Christian nonprofit ministry sharing the Gospel through teaching, media, conferences, and humanitarian outreach worldwide.
0+ YOE0-2 years relevant experience, Bachelor's degree or equivalent, experience with SQL Server, Salesforce and Marketing Cloud preferred; data management, query writing, documentation, and strong interpersonal and problem-solving skills.
Salesforce, Marketing Cloud, SQL Server, Agent360, Data360, Flow
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5d
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Branch Administrator
Chesterfield, Missouri, United States
$20/hr OnsiteFull Time
Graybar
Graybar: Distributes electrical, communications, and data networking products.
0.5+ YOEHigh school education and 6+ months of related experience preferred. Requires computer systems knowledge, attention to detail, data entry, organization, and communication skills.
SAP
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2mo
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Geospatial Systems Engineer – Multiple Positions at Junior/Mid/Senior Levels
Springfield or Vienna or St. Louis or Sun Prairie
OnsiteFull Time
NV5
NV5NASDAQ: NVEE: Technical engineering and consulting for infrastructure and energy projects.
8+ YOEActive Top Secret/SCI clearance, bachelor’s in STEM, 8+ years experience, enterprise ArcGIS and systems administration, scripting (Python/PowerShell/JS/C#), RDBMS and network knowledge.
ArcGIS, ArcGIS Enterprise, ArcGIS Desktop, ArcGIS Online, Portal for ArcGIS, ArcGIS Runtime, Python, PowerShell, JavaScript, C#, SQL Server, Oracle, PostgreSQL, Windows, Linux
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3w
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Security Engineer and IT Systems Admin.
St. Louis or Jefferson City
OnsiteFull Time
The Pictsweet Company
The Pictsweet Company: Family-owned producer and distributor of frozen vegetables.
2+ YOEActive Secret clearance, bachelor's degree or equivalent experience, Security+ or higher certification, and at least 2 years in cybersecurity, information assurance, system administration, or IT operations.
Risk Management Framework (RMF), Security Control Assessments (SCAs), Change Control Board (CCB), VM images, Department of Defense Instruction (DoDI), National Institute of Standards and Technology (NIST), Security Technical Implementation Guide (STIG), Assured Compliance Assessment Solution (ACAS), Nessus, Security Content Automation Protocol (SCAP) Compliance Checker (SCC), Enterprise Mission Assurance System (eMASS), Control Correlation Identifiers (CCI), Committee on National Security Systems Instruction (CNSSI), ISEC-MED, Plan of Action and Milestones (POAM), Security Control Assessor-Validator (SCA-V), Security Impact Analyses (SIA), Windows
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1mo
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Sales Administrator
St. Charles, Missouri, United States
OnsiteFull Time
Eastern Metal Supply
Eastern Metal Supply: Distributor and manufacturer of custom and standard aluminum products.
Provide sales support and order coordination, follow up on credits/RMAs/backorders, monitor systems and delivery windows, collaborate cross-functionally, and communicate with customers and sales teams.
CIMS, WebHelm, Accuterm, Optimiroute, M3
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1mo
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Office Administrator Bilingual
St. Louis, Missouri, United States
$60k/yr OnsiteFull Time
4M Building Solutions
4M Building Solutions: Provides commercial janitorial, housekeeping, and facility maintenance services.
2+ YOE2+ years HR/admin experience, undergraduate degree or equivalent preferred, proficiency with HRIS and payroll systems, recruiting and onboarding experience, payroll data entry, and strong organizational skills.
HRIS, Winteam, Equifax case builder, Paycor, Ehub
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1mo
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Systems Support Analyst
St. Louis, Missouri, United States
$47k-$64k/yr RemoteFull Time
Behavioral Health Response
Behavioral Health Response: Nonprofit behavioral health organization providing 24/7 crisis support, telephone counseling, and mental health resources nationwide.
Provide first-line IT support, account administration in Active Directory/Microsoft Admin Center/Vonage/Salesforce, endpoint and patch monitoring, and end-user training; bachelor\u0002s degree preferred.
Active Directory, Microsoft Admin Center, Vonage, Salesforce, WSUS, Microsoft Office, Microsoft Teams
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1w
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Help Desk Tier III (Systems Administrator)
Scott Air Force Base or St. Louis
OnsiteFull Time
D&G Solutions
D&G Solutions: An IT services providing mission-focused support to government and defense organizations.
Bachelor's degree in a technical field, or any bachelor's degree with an accepted certification; scripting experience; enterprise technology experience; and ability to obtain and maintain DoD Secret clearance.
PowerShell, Bash, Python, TCP/IP, DHCP, DNS, VPN, VMware, Hyper-V, KVM, Windows Server
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14h
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Learning Management System Administrator & Compliance Analyst
Saint Louis, Missouri, United States
$52k-$85k/yr OnsiteFull Time
Christian Hospital
Christian Hospital: Nonprofit acute-care community hospital providing inpatient, outpatient, emergency, and specialty care to north St. Louis County.
2+ YOERequires 2–5 years of experience supporting learning management systems, data reporting, quality processes, and performance improvement. Bachelor's degree and 5–10 years of experience preferred.
Learning Management System (LMS), SABA, Microsoft Excel
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2mo
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DevOps Engineer - Junior
Denver or Sterling or St. Louis
$58k-$116k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provider of specialized IT and mission-critical government services.
0+ YOETS/SCI clearance (ability to obtain Poly), Bachelor's degree in a technical discipline, 0–3 years supporting DevOps/DevSecOps or system administration, familiarity with Linux, scripting (Python/Bash/PowerShell), Git, CI/CD and container technologies.
Linux, Python, Bash, PowerShell, Git, Jenkins, GitLab CI/CD, GitHub Actions, Bamboo, Docker, Kubernetes, AWS, Azure, Google Cloud, Terraform, Ansible
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1mo
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Medical Office Assistant
Waterloo, Illinois, United States
$15-$20/hr OnsiteFull Time
Deaconess Health System
Deaconess Health System: A health system providing hospital and medical care services.
Providing patient-facing administrative support including scheduling, patient data collection, payments, and use of clinic computer systems; high school diploma/GED preferred; strong communication and organizational skills.
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2mo
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Admin Assistant, Private Dining and Sales
Chesterfield, Missouri, United States
OnsiteFull Time
Prime Hospitality Group
Prime Hospitality Group: Operates a portfolio of upscale restaurants and hospitality venues.
Administrative support for private dining and event sales; strong phone and written communication, attention to detail, proficiency with Tripleseat, OpenTable, Microsoft Office, email and reservation systems; prior hospitality/admin experience preferred.
Tripleseat, OpenTable, Microsoft Office, PDF
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1w
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Administrative Assistant - Business Office Data Entry
St. Louis, Missouri, United States
$18/hr OnsitePart Time
Lindbergh Schools
Lindbergh Schools: Public school district providing K-12 education in Missouri.
Processes accounts payable, maintains vendor and invoice records, supports reconciliations and reporting, and uses financial accounting systems and contract databases.
accounting system, financial accounting software, contract database
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1mo
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Health Information Specialist I- St. Louis, MO
St. Louis, Missouri, United States
OnsiteFull Time
Datavant
Datavant: Health data connectivity and collaboration platform.
Process release of information and medical record requests, maintain HIPAA-compliant confidentiality, document in multiple systems, strong data entry and communication skills.
Microsoft Office, Microsoft Word, Microsoft Excel, EHR
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1d
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Receptionist
St. Louis, Missouri, United States
OnsiteFull Time, Part Time
Pine Grove Manor Skilled Nursing
Pine Grove Manor Skilled Nursing: For-profit skilled nursing facility providing 24-hour nursing, rehabilitation, long-term care, and palliative services to St. Louis residents.
Welcomes visitors, resolves problems, manages security and telecommunications systems, handles inquiries and complaints, and routes messages to appropriate staff.
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2mo
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Clerk Typist II, 2026-2027
St. Louis, Missouri, United States
$33k-$37k/yr OnsiteFull Time
St. Louis Public Schools
St. Louis Public Schools: St. Louis Public Schools provides K-12 education in St. Louis.
Performs varied clerical duties including skilled typing, maintaining filing systems, preparing purchase orders/invoices, producing reports, and exercising independent judgment within established procedures.
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